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Metastasis is a complex process by which the malignant cancer cells from the breast expand into other regions of the body. Breast cancer cells will typically travel wither through the lymphatic system or through blood vessels to reach distant areas of the body.
Breast cancer tends to metastasize primarily to the lungs, liver, brain, and regional lymph nodes, and the bone. No one really knows what factors will make a certain patient more or less susceptible to breast cancer metastasis.
Recent breast cancer research suggest that the body’s regulatory T cells, which are an integral part of the immune-response system, may play a key role in metastasis.
According to some estimates, between 20% to 30% of all women first diagnosed with localized breast cancer will usually develop it in other areas of the body. Some estimates suggest that between 10% to 15% of all diagnoses will be of aggressive forms of the breast cancer which will potentially metastasize within three years following the original diagnosis.
While the choice to undergo chemotherapy will always be determined on an individual basis, the fact remains that approximately 80% of all breast cancer patients are treated with some degree of adjuvant chemotherapy.
If a person who was previously treated for cancer gets diagnosed with cancer a second time, is the new cancer a new primary cancer or metastatic cancer?
A patient with a history of breast cancer presented with increasing back pain two weeks after her fall. TECHNIQUE: A planar whole body bone scan was performed with, 3 hour delay, and spot views of the spine and pelvis. NUCLEAR MEDICINE BONE SCAN FINDINGS: The bone scan revealed abnormal activity in the L2 vertebral body that could have been metastatic disease or a post-traumatic fracture.
An MRI of the lumbar spine was suspicious for possible bone marrow metastases, and an FDG PET scan was ordered for restaging prior to treatment planning (MRI images are not shown). Since FDG PET can be negative in sclerotic or osteoblastic bone lesions, further evaluation with was recommended.
The patient received appropriate systemic chemotherapy after accurate identification of the presence and the extent of bone disease with 18F NaF PET bone imaging. Your doctor may order imaging tests to see if the cancer has spread to the bones, even if you haven't noticed any symptoms. As bone metastases damage bone, calcium is often released from the bone into the bloodstream. Surgery is often used as a treatment to help stabilize weakened bone that may be at risk for breakage. Bone metastases aren't usually curable, but treatments may be able to shrink them and relieve symptoms. AbstractResponse criteria represent the standard by which the efficacy of therapeutic agents is determined in cancer trials.
An estimated 569,490 Americans are expected to die of cancer in 2010, accounting for approximately 25% of the overall mortality (1). Change in tumor size following therapy, also known as objective response (4, 5), is a robust indicator of outcome in the treatment of numerous solid tumors (6-9) and forms the basis for anatomic response criteria. PET has the potential to revolutionize the definition of measurable tumors because it introduces imaging criteria based on function. All criteria are subject to minimum lesion size limitations and PERCIST is also subject to minimum FDG uptake limitations.
The MDA criteria can allow more bone lesions to be considered measurable disease than does the RECIST 1.1 system by allowing physical measurement of well-defined bone lesions regardless of soft tissue extension, by allowing regimented subjective assessment of ill-defined lesions, and by taking into account characteristic behaviors such as the development of healing sclerosis. Findings: the PA chest film shows a solitary expansive lytic lesion in the anterior aspect of the third right rib (arrow), without an accompanying soft tissue mass. Teaching point: Solitary expansive lesion in a rib in a young person is highly indicative of fibrous dysplasia, which is the most common benign lesion of ribs.
Agree with fibrous dysplasia – other considerations are enchondroma, though less likely due to the appearance. Expansive lesion is identified and low density defined ranges, which seems to depend on the portion of the third rib axillary right.
About this blogThis blog is written by staff and members of the European Society of Radiology. Science, Technology and Medicine open access publisher.Publish, read and share novel research. Inflammatory Environmental, Oxidative Stress in Tumoral ProgressionCesar Esquivel-Chirino1, 4, 5, 6, Jaime Esquivel-Soto1, 6, Jose Antonio Morales-Gonzalez2, Delina Montes Sanchez3, 4, 5, Jose Luis Ventura-Gallegos4, 5, Luis Enrique Hernandez-Mora1 and Alejandro Zentella-Dehesa4, 5[1] Facultad de Odontologia, Universidad Nacional Autonoma de Mexico, Mexico[2] Instituto de Ciencias de la Salud, Universidad Autonoma del Estado de Hidalgo (UAEH), Mexico[3] Programa de Genomica Funcional de Procariotes, Centro de Ciencias Genomicas, Universidad Nacional Autonoma de Mexico, Campus Morelos, Mexico[4] Departamento de Medicina y Toxicologia Ambiental, Instituto de Investigaciones Biomedicas. An unexpected finding was the abundant presence of the expression of vascular endothelial growth factor (VEGF) in breast carcinoma lines.
The involvement of GM-CSF (Granulocyte Macrophage Colony Stimulating Factor) in cancer is complex, since it seems to require the presence of other cytokines such as IL-4 and IL-6, and there are reports antagonistic to their involvement in tumorigenesis.
The IL-6 is recognized as a classic inducer of the states of chronic inflammation and that promote the activation of vascular endothelium.
Expression of IL-8 in colorectal cancer favors an increase in tumorigenesis and metastasis, this increase is due to IL-8 is associated with expression of MMP-2 and MMP-9, the activity of these metalloproteases have been identified in physiological tissue remodeling processes like normal healing, but also participate in tissue remodeling associated with pathological processes including invasion [74]. IP10 is a protein induced by interferon, has been reported that this protein inhibits proliferation and metastatic tumors, that expression of IP10 in patients with stages II and III colorectal cancer correlate with the development of metastasis and a poor prognosis. Regulated upon activation normal T-cell expressed, and secreted is a chemokine that belongs to the CC class, which distinguishes it from IL8, which belongs to the CXC class. Oxidation-reduction reactions within the cell, muscle relaxation, control of erythropoietin production, signal transduction from various receptors, enhancement of immunological functions and oxidative Table 1. Redox reactions in metabolic processes.During cellular respiration O2 is reduced by four electrons to the transport of H2 for generating two molecules of water through an oxidative enzyme which results is the formation of superoxide anion (electron), hydrogen peroxide (two electron ) and hydroxyl ions (three electrons).
Absorption of radiant energyElectromagnetic radiation (x rays), gamma rays, infrared, UV, microwave etc. Inflammation and immune response.This response induced by activated leukocytes, that is caused by a protein complex located at the plasma membrane that employs NADPH oxidase and some intracellular oxidase and this generated a superoxide anion. Metabolism of drugsMost chemicals do not show biological activity in its native form these have to become toxic reactive metabolites to act on their target molecules. Detection, clinical relevance and specific biological properties of disseminating tumor cells. Cancer progression and growth: relationship of paracrine and autocrine growth mechanisms to organ preference of metastasis. Environmental control of invasiveness and metastatic dissemination of tumor cells: the role of tumor cell-host cell interactions. Endothelial cell development, vasculogenesis, angiogenesis, and tumor neovascularization: an update. Differentiation of endothelial cells: Analysis of the constitutive and activated endothelial cell phenotypes. Interaction of vascular endothelial cells with leukocytes, platelets and cancer cells in inflammation, thrombosis and cancer growth and metastasis.
Once metastasis has occurred, it is much more difficult to effectively treat breast cancer. I have created a newer version of this page with more up-to-date information of Breast Cancer Metastasis.
When breast cancer metastasize to the axillary lymph nodes (under the arm) it is still considered to be a relatively early stage of metastasis, and is potentially curable. About 70% of breast cancer deaths are due to breast cancer metastasis to the bone, with the next most common site of breast cancer metastasis is the brain, at close to 10%. It is speculated that the T cells produce a protein which seems to accelerate the spread of breast cancer cells to other areas of the body.
However, breast cancer metastasis can take place 10 years or even longer after the original treatment. Statistically, the use of adjuvant chemotherapy to treat and prevent the spread of metastatic breast cancer can lead to a 3% to 10% increase in the 15 year breast cancer survival rate overall. Approximately 90% of deaths due to breast cancer are from metastasis, and the overall survival rate for metastasized breast cancer is only about 16%.
Virtually all cancers, including the cancers of the blood and the lymphatic system can form metastatic tumors.
Cancer cell metastasis usually involves the following steps: local invasion, intravasation, circulation, arrest and extravasation, proliferation, and angiogenesis. Metastatic cancer may be treated with chemotherapy, biological therapy, targeted therapy, hormonal therapy, radiation therapy, surgery, or a combination of these treatments. Tumour-infiltrating regulatory T cells stimulate mammary cancer metastasis through RANKL–RANK signalling.
A sodium fluoride F 18 (18F NaF) bone PET scan was ordered to confirm the presence and extent of bone marrow metastasis prior to treatment planning. Additional foci were noted in vertebral bodies L3, L5, the superior end plate of L4, and the right transverse process of L3; all consistent with metastatic bone disease that was not visualized in the FDG PET scan.
Cancer cells from that area break away and travel through the bloodstream and lymphatic system. Although your doctor can't tell for sure if cancer will spread, certain types of cancer are more likely to spread to bone. This can affect the nerves, causing loss of mobility, muscle weakness, numbness, and trouble urinating.
Over time, this can cause them to break, even during routine activities like coughing or sitting down in a chair. High calcium levels can be a serious problem and can lead to nausea, constipation, dehydration, and even coma. Your doctor may insert rods, screws, pins, or plates to help stabilize a bone and keep it from breaking. But if pain persists, your doctor may suggest over-the-counter pain relievers, such as acetaminophen, ibuprofen, or naproxen. Bone metastases are a common manifestation of advanced disease with autopsy studies showing an incidence of 33-36% in patients with lung cancer (2, 3), 68% in prostate cancer (3), and 73% in breast cancer (2, 3).
RECIST (10), updated to RECIST 1.1 in 2009 (11), was designed to standardize the assessment of therapeutic response to allow meaningful comparison of drug efficacy among individuals in the same study and across different studies (12, 13). The International Union Against Cancer (UICC) (17) and the World Health Organization (WHO) (4) published criteria in 1977 and 1979, respectively.
The regular, well-defined tumor margins that are necessary for reproducible anatomic measurements are of lesser importance in functional imaging. Metabolic imaging criteria can allow bone metastases to be measured in the absence of anatomic change by assessing tumor metabolism. Whereas in normal cells the expression of VEGF is dependent on a condition of hypoxia, surprisingly VEGF production by tumor cell lines and occurred at a concentration of oxygen partial indicating 20% indicative of impaired VEGF expression. It has also been reported that IL-6 is produced by tumors that develop metastases to the liver, as the case of colon and mammary gland cancer. Also in melanomas have been identified as IL-8 acts as an angiogenic factor and also promotes mitosis, therefore the IL-8 has been postulated as a potential therapeutic target. The detection of IP10 could be used as a prognostic marker in stage II and III colorectal cancer patients.
RANTES expression in tumor cells has been associated with tumorigenesis and is consistent with our finding of RANTES the products secreted by breast carcinomas. Reactive oxygen speciesReactive oxygen species are produced in normal condition them in a living cell during cellular respiration, energy production and various events of growth and cell death, these are degrade by the defensive systems.
Free radical and carcinogenesisFree radicals are atoms or groups of atoms that in their atomic structure present one or more unpaired electrons in the outer orbit.
Because this page is getting a little bit old, doesn’t mean that you still can’t use it!
The only way to effectively treat the whole body is through chemotherapy and hormonal therapy. The inflammatory protein RANKL seems to influence the T-cells’ ability to spread cancer cells to distant areas of the body. Following breast cancer treatment, it has been estimated that up to 40% of women will experience a relapse and develop a distant metastasis.
Still, almost 20% of women with metastatic breast cancer may still live more than five years. Although rare, the metastasis of blood and lymphatic system cancers to the lung, heart, central nervous system, and other tissues have been reported.
Although most cancers have the ability to spread to many different parts of the body, they usually spread to one site more often than others.
Because cancers to the lymphatic system or the blood system are already present inside lymph vessels, lymph nodes, or blood vessels not all of these steps are needed for their metastasis. For example, metastatic disease to the bone causes severe, progressive pain, and less commonly, pathological fracture, erythema over the affected bone and swelling.
Researchers are now studying new ways to kill or stop the growth of primary cancer cells and metastatic cancer cells, including new ways to boost the strength of immune responses against tumors. Innumerable lesions were identified in the pelvis that were appreciated only in retrospect on a prior CT scan. At other times, bone metastasis can cause bone to become harder, though it may still break. These treatments, called systemic because they affect the whole body, can cause side effects such as nausea, vomiting, fatigue, hair loss, and increased risk of infection.
In certain cancer patients, bisphosphonates may help curb bone pain, reduce bone damage, lower elevated calcium levels, and decrease the risk for broken bones. If these medications don't bring relief, your doctor may prescribe a stronger pain reliever, such as codeine, hydrocodone, oxycodone, or morphine.
You may have a quicker recovery if you take an active role in your health -- by asking questions, learning more about your condition and its treatments, and taking care of yourself. Because bone metastases are typically located in irregularly shaped bones and are difficult to measure with rulers, they have been previously considered unmeasurable disease.
While many patients receive therapy at major cancer centers, numerous other patients choose local or regional hospitals, and most imaging studies include the skeleton secondarily if not primarily (e.g.

RECIST 1.1 specifies that up to 5 target lesions, representing all affected organ systems but with no more than 2 target lesions per organ, be selected for measurement throughout the course of a therapeutic trial. While at the time representing the most sophisticated attempts to standardize the evaluation of tumor response, these criteria were published before the widespread availability of CT.
According to the MDA criteria, CR is defined as complete sclerotic fill-in of lytic lesions on radiographs or CT, the restoration of normal bone density on radiography or CT, the disappearance of abnormal tracer uptake on skeletal scintigraphy (SS), and the normalization of signal intensity on MRI (Fig.
The MDA criteria identified nonresponders earlier and better correlated with clinical response in the first 2-6 months of therapy than did the WHO criteria. FDG is a radiolabeled form of glucose that cannot be metabolized and therefore accumulates in cells, which take up the molecules as if they were normal glucose. Response criteria are of crucial importance to the care of many cancer patients, and the tumor response assessment of bone metastases is assuming a greater role in therapeutic management. The appearance of the lesion is very suggestive of a benign process and, as many of you pointed out, fibrous dysplasia is the first possibility.
The activated phenotype of endothelial cellsEndothelial cell activation is associated with a number of distinct phenotype changes that, much like differentiation processes of the constitutive phenotype of endothelial cells, serve their need to adapt to functional requirements.
In cancer constitutive secretion of VEGF independent of a condition that favors hypoxic tumor angiogenesis and growth in a clinical setting and is a marker of poor prognosis [67].
In contrast to the line described breast epithelial MCF7-A benign growth factors secreted able to induce expression of IL-6 and GM-CSF in the tumor line R2T1AS breast cancer that is associated with a higher rate of growth and a higher tumorigenic capacity in vivo. The activity of this cytokine in the soluble factors tumor could be further enhanced by the presence of other co-factors secreted by cells [72-73]. In particular, we have sought to interfere with IL-8 with the purpose of reducing tumor growth, an alternative that has developed is the use of an anti-IL-8 in nude mice with liver cancer. This has led to propose that IP10 might be used as a prognostic marker in stage II and III colorectal cancer patients [76-77].
The presence of RANTES in the tumor microenvironment may be chemoattractant to tumor cells. Therefore, the cells self-regulate their production and degradation of ROS is found transiently in the cell without causing any damage to the cellular level, and for that reason the cell maintains an equilibrium constant but as this production increases oxidative stress is generated, this relates whit different pathological process such as damage in the cell structure and function, degenerative process and cancer, also influence within the inflammation and the immune response, as these are generated by macrophages and neutrophils as mediators for the destruction of pathogens and dead tissue. These free radicals steal electrons from other molecules in effort to heal themselves, ultimately creating new free radicals in the process by stealing electrons. Sometimes metastasis has occurred at the same time the original breast cancer is diagnosed. It is believed that by interfering with RANKL’s ability to interact with the T-cells, the early metastasis of breast cancer cells can be significantly inhibited. In the United States in 2011 there are an estimated 16200 women living with metastatic breast cancer.
Above all one should remember that the situation for each woman will be unique, and ultimately statistics are meaningless. Metastatic breast cancer to the brain causes persistent, progressively worsening headache, visual changes, seizures, nausea, vomiting, vertigo, behavioral and personality changes, and increased intracranial pressure.
Focal uptake in the left 7th rib and right glenoid were consistent with metastatic disease.
Larger tumors that have spread to the lymph nodes are also more likely to spread to the bones.
Other common areas for bone metastases include the thigh bone, upper arm bone, ribs, hips, and skull. A bone scan can often find metastases earlier than an X-ray, and can check the whole body at once. New developments in cancer response criteria have increased awareness of the importance of the response of bone metastases to therapy.
The interval development of an FDG-avid focus, in the absence of any other indication of disease progression, is considered progressive disease under RECIST 1.1 unless it corresponds to a pre-existing, anatomically stable abnormality. Both sets of criteria, which have been largely supplanted by RECIST and RECIST 1.1, consider bone metastases to be measurable disease. In isolation, this response qualifies as complete response even though progressive sclerosis may be seen on subsequent examinations. Early signs of disease progression are valuable, allowing the halting of ineffective therapy in a timely fashion and the possible substitution of effective therapy. Knowledge of the fundamental concepts of tumor response criteria (anatomic, bone, and functional) and the appearance of bone metastases as they respond to treatment or progress can aid in the interpretation of studies in a manner that will render them of optimal value to the patient and clinician. IntroductionThe incidence and prevalence of cancer has been increasing in such as degree that it has become the second or third leading cause of death worldwide, depending on ethnicity or country in question and is consequently a major public health, cancer is a leading cause of death in many countries, accounting for 7.6 million deaths (around 13% of all deaths) in 2008. In cancer, constitutive secretion of VEGF-independent hypoxic condition favors tumor angiogenesis and growth in a clinical setting and is a marker of poor prognosis [68]. Moreover, continued exposure of GM-CSF plus IL-4 of mesenchymal cells from human bone marrow, resulted in an increase in the morphological transformation and increased rate of growth both in vitro and in vitro mesenchymal cells, indicating the induction of a transformed phenotype. The results show that administration of neutralizing anti-IL8 significantly decreased tumor growth, even more interestingly this decrease is associated with decreased expression of MMP-2 and MMP-9. From this point of view is interesting that the tumor-associated endothelial cells, when stimulated with MIF1-alpha can release RANTES [78]. Free radicals are formed from a number of causes such as cigarette smoke, pollution, exposure to sunlight all cause the formation of free radicals.
But in other cases the metastasis of breast cancer is found months or even years after the initial treatment. No one can predict with any degree of certainty whether or not the body will either experience or be able to recover from metastatic breast cancer. The ability of a cancer cell to metastasize successfully depends on it’s individual properties. Metastatic disease to the liver causes jaundice, elevated liver enzymes, abdominal pain, loss of appetite, nausea, and vomiting.
Additional focus of activity was seen in the proximal metaphysis of the right femur that was faintly visualized, if at all, on the bone scan.
Ablation is another local treatment that destroys tumors with cold, heat, electric currents, or alcohol. It is intended for general informational purposes only and does not address individual circumstances. Thus, the appearance and behavior of bone metastases can be detected on a wide variety of imaging studies that are performed for many different indications.Response criteria represent the standard by which the efficacy of new therapeutic agents is determined in cancer treatment trials. Lesions may be measured using CT or magnetic resonance imaging (MRI), but CT is preferred in most situations because of the variability of MRI scan parameters. The metastasis to the severely compressed T6 vertebral body is an example of a lesion that remains unmeasurable with anatomic response criteria.
In isolation, these findings might be representative of disease progression, but lytic lesions in other locations (not shown) demonstrated sclerotic fill-in, raising the possibility of an osteoblastic flare rather than progressive disease.
In addition to their utility for guiding treatment decisions, the MDA bone response criteria closely reflect the behavior of bone metastases on radiography and CT and can be used as guidelines for the interpretation of these studies whether or not a patient is enrolled in a therapeutic trial. Since many malignancies are highly metabolic and accumulate FDG, it is the most commonly used PET agent for oncologic indications.
Assessment of tumor metabolism allowed therapeutic response to be measured in the absence of any other indication of change.
European Organization for Research and Treatment of Cancer, National Cancer Institute of the United States, National Cancer Institute of Canada.
Deaths from cancer worldwide are projected to continue rising, with an estimated 13.1 million deaths in 2030.
When endothelial cells are activated by these cytokines are functional disorders involving immediate responses, for example, some pathological conditions such as sepsis, are associated with endothelial conversion to a phenotype activated [29-30].
Whereas previous reports indicate that the involvement of GM-CSF requires other cytokines [69-70]. Something similar is observed using the same experimental treatment of melanoma with a decrease in angiogenesis [75]. Study that evaluated the expression of RANTES and its receptor CCR5 in 60 patients with metastatic gastric cancer, were identified elevated expression levels, where it is concluded that RANTES and its receptor may contribute to gastric cancer metastasis by promoting responses TH1 and TH2.
Metastatic breast cancer to the lung or pleura causes chronic cough, dyspnea, abnormal chest x-ray, and chest pain.
It is not a substitute for professional medical advice, diagnosis or treatment and should not be relied on to make decisions about your health. Response criteria specific to bone metastases have been developed at The University of Texas MD Anderson Cancer Center (MDA criteria) and can be used to assess therapeutic response in numerous types of bone metastases. The most commonly used set of criteria is the Response Evaluation Criteria in Solid Tumors (RECIST). The resultant void regarding the evaluation of bone metastases led to the development of bone-specific response criteria at The University of Texas MD Anderson Cancer Center in 2004 (18). The MDA criteria can be considered for use in conjunction with other cancer response criteria or in patients with bone-only metastases and no measurable disease. The following review of the PERCIST criteria includes many of the concepts discussed in the source article (27).Evaluation of tumor response with FDG PET has several advantages over anatomically based criteria. The activated phenotype characterized by activation of constitutive nitric oxide synthase (NOS), also accompanied by changes such as increased expression of cell adhesion molecules (CAMs) and E-selectin (CD62E), ICAM-1(CD54), VCAM-1(CD106), P-selectin (CD62P) Fig (1). In our results, we found increases in IL-8 in the soluble factors soluble breast cancer [66]. By comparing a variety of biological markers in a group of biopsies of mammary gland cancer, RANTES was the only marker present in all biopsies [79].The reported findings strengthen the idea that soluble factors of tumor microenvironment may be relevant in the final stages of the metastatic spread and that these effects may be mediated by cytokines, chemokines, and growth factors present in the soluble factors secreted by tumor cell lines.
When increased production of reactive species and have a deficiency in the antioxidant system they cause significant neoplastic changes. And other non specific systemic symptoms of metastatic breast cancer include fatigue, malaise, weight loss and poor appetite. Never ignore professional medical advice in seeking treatment because of something you have read on the WebMD Site. Functional imaging criteria, such as the recently developed Positron Emission Tomography Response Criteria in Solid Tumors (PERCIST) allow response to be measured in the absence of anatomic change through assessment of metabolic activity.
These and similar anatomic criteria focus predominantly on the physical measurement of solid tumors. This increase of 91% exceeds the required > 20% increase that is necessary to qualify for the progressive disease category. The MDA criteria updated the UICC and WHO bone response criteria by expanding radiographic assessment and incorporating both CT and MRI.The MDA criteria divide response into 4 standard categories (CR, PR, PD, and SD) and include quantitative and qualitative assessments of the behavior of bone metastases (Table 2).
Incidental note is made of interval insufficiency fracture of the superior endplate of L4 on (f).
Some chemotherapeutic agents are cytostatic rather than cytocidal and therefore do not result in a profound change in tumor size despite their effectiveness (28-30), and some malignancies, such as gastrointestinal stromal tumors, do not demonstrate PR through a large decrease in size (31).
When a tumour successfully spreads to other parts of the body and grows, invading and destroying other healthy tissues, this process is referred to as metastasis, and the result is a serious condition that is very difficult to treat, because the progression to metastases is the leading cause of death associated to cancer. These changes allow the endothelium to participate in pathological conditions including inflammation, coagulation, cell proliferation, metastasis, tumor angiogenesis. This indicates that IL-8 could be used as a marker associated with tumor progression, regardless of tumor type. These elements found in high concentrations are known to be capable of inducing the activated phenotype of endothelial cells to a variety of physiological and pathological cellular responses.3. In some diseases, such as Bloom syndrome develops lymphomas, leukemias and carcinomas, in anemia are implicated the production of these and alterations of antioxidant defense mechanisms at the systemic level [82-83]. As monitoring tumor response of bone metastases becomes more important in the management of cancer, so does the demand on radiologists and nuclear medicine physicians for accurate interpretation of the behavior of these lesions.
Disease that is not easily measurable with a ruler or calipers, such as most bone metastases, is designated as unmeasurable.
The soft tissue component is to be measured in an identical manner to that used for other target lesions (Fig. The increased MDP uptake on the bone scan (b) was the result of healing sclerosis and representative of a scintigraphic flare in a patient undergoing partial response rather than progressive disease.
By reflecting change in tumor metabolism, FDG PET scanning can provide a method by which tumor response can be measured in the absence of marked anatomic change (32).
Metastatic cells in this process must interact with the endothelium in three stages of tumor progression. All these cellular interactions are regulated by temporal and spatial presentation of various cell adhesion molecules and chemotactical molecules displaying appropriate specificity and affinity for proper development and functioning of the organism [31-32].
Oxidative stress and free radicals: role in cancer developmentDuring the inflammatory process macrophages and endothelial cells, generate a large amount of growth factors, cytokines and reactive oxygen species (ROS) and nitrogen (RNS) that can cause DNA damage. Some epidemiological information indicates that tumor incidence is lower in populations where the diet is rich in antioxidants like fruits and vegetables [84].Tumor cells have a high activity of free radical formation in contrast to healthy cells.
In recent years, the interaction between these cell populations has been seen as part of a complex microenvironment tumor-associated. If macrophages and remain on the endothelium may allow the tissue damage continues chronic inflammation predisposes to malignancy [56,80]. Measurements are to be made in the plane of acquisition (typically axial for CT unless isotropic reconstructions are performed). Interval visualization of sclerotic lesions or lytic lesions with sclerotic rims, in the setting of other signs of PR, does not indicate disease progression but the healing of previously inconspicuous lesions (19). FDG PET has also been shown to provide more rapid response data than anatomic measurements (43-45). Mets from RCC and thyroid can be excluded on the basis of no previous history,no lung lesions, only single rib involvement(though it can occur),expansile lytic mets are not seen in breast CA, brown?s tumor in rib can be excluded on the basis of no other changes of hyperparathyroidism(like rib notching, rugger jersey spine, no history of chronic renal disease,normal visualised clavicles). MetastasisMetastasis is the result of cancer cell adaptation to a tissue microenvironment at a distance from the primary tumor, is a complex process involving multiple steps: first, when cancer cells break away from the primary tumor, they invade the host stroma, intravasate into lymphatic or blood vessels, spread to the capillary bed of distant organs, where they invade into new surrounding tissues and proliferate to form secondary tumors [34-35]. Has been shown that the oxidation of guanine to 8-oxo-dG (oxidation product DNA) induces errors in their replication. Therefore, the absence of measurable tumors can significantly affect patient disease management. Osteoblastic flare cannot be diagnosed if any preexisting lesions show signs of progression (e.g.

Age is against paget’s and chondrosarcoma(also no arc or ring like calcifications seen within the lesion). When cancer is detected at an early stage, before it has spread, it can often be treated successfully by conventional cancer therapies such as surgery, chemotherapy, local irradiation, metastatic diffusion of cancer cells remains the most important clinical problem, because when cancer is detected after known to have metastasized, treatment are much less successful [36].
IntroductionIn different pathological process the cell injury is induced by free radicals, is an important mechanism of cell damage in many pathological conditions, such as chemical and radiation injury, ischemia injury, cellular aging and some immune system cells such as the phagocytes [82-84]. This article reviews anatomic (RECIST 1.1), bone (MD Anderson [MDA]), and metabolic (Positron Emission Tomography Response Criteria in Solid Tumors [PERCIST]) cancer response criteria, with a focus on the developing role of bone metastases and the interpretation of the treatment response of bone metastases seen on imaging studies.
Many acceptable scan acquisition parameters are in clinical use, and several previous attempts have been made to standardize PET for cancer trials through guidelines such as those published by the European Organization for Research and Treatment of Cancer (EORTC) (49), the Netherlands Society of Nuclear Medicine (50), and the National Cancer Institute (51). Tumor and normal surrounding cells such as endothelial cells, soluble factors derived from this two cell populations and extracellular matrix [9-12], compose the tumor microenvironment. The metastatic capacity of tumor cells correlates with their ability to exit from the blood circulation, to colonize distant organs, and to grow in distant organs. Antioxidants and Chemoprevention in cancerAntioxidants are substances that prevent damage to cells caused by free radicals, it can cause damage to DNA, leading to the possible development of cancer [87].
PERCIST, published in the Journal of Nuclear Medicine (27), represents the most recent effort to create standardized criteria that accurately reflect response in the largest number of malignancies.
There are other factors in the development of cancer such as genetic, environmental, as well as the role of oxidative stress and free radicals in response to damage caused by chemicals, radiation, cellular aging, ischemic lesions and cells immune system [13]. Metastasis is a complex process that includes local infiltration of tumor cells into the adjacent tissue, transendothelial migration of cancer cells into vessels known as intravasation, survival in the circulatory system, extravasation and subsequent proliferation in competent organs leading to colonization [36-38].
The generation of this species chemical types, is normal in a normal cells; however, when these start to produce in excess and the antioxidant system is deficient, oxidative stress occurs. Antioxidants search for these free radicals and lend them an, this stabilizes the molecule, thus preventing damage to other cells.
However, MRI has been shown superior to CT in delineating the extent of primary bone tumors (which are similar to target bone lesions because they typically produce large soft tissue masses) and their relationship to adjacent structures (14, 15). Initially, tumor cell aggregates detachment from the primary tumor, next the cells actively infiltrate the surrounding stroma and enter into the circulatory system, traveling to distinct sites to establish the secondary tumor growth. This causes damage cells: hepatocytes, kupffer cells and endothelial cells, through induction of inflammation, ischemia, fibrosis, apoptosis, necrosis or other atypical transformation in the cell structure and function. Antioxidants also turn free radicals into waste by products, and they eventually are eliminated from the body.
The value of the high soft tissue contrast resolution of MRI was shown in a prospective study comparing MRI and CT for the detection of locally recurrent tumors in 49 patients following the resection of musculoskeletal malignancies (16). An increase in tracer uptake on SS may need correlation with other imaging studies to exclude the scintigraphic flare phenomenon, which is typically seen within the first 3 months after therapy. In the bloodstream, a very small number of tumor cells survive to reach the target organ, indicating that metastasis formation must be regarded as a very ineffective event. Scintigraphic flare occurs when healing sclerosis results in more tracer uptake than was caused by the untreated lesion (Fig.
Antioxidants interact with free radicals to stabilize them so that, being able to avoid some of the damage that free radicals can cause. Millions of carcinoma cells enter into the circulatory system, but the majority of them die during transportation, and only 1-5% of viable cells are successful in formation of secondary deposits in distinct sites [37-40]. FlavonoidsFlavonoids are found in numerous plants and vegetables, with a wide distribution through the plant kingdom.
MRI scans with and without the use of intravenous gadolinium contrast can be considered for the follow-up of measurable bone lesions. It is important to analyze the role of antioxidants as an alternative that contributes to cancer treatment and to promote their use and consumption in cancer prevention 2. This class compounds numbers more than 4000 members and can be divided into five subcategories: flavones, monomeric flavanols, flavanones, flavonols and anthocyanidines. Tumoral progressionTumors often become more aggressive in their behavior in more aggressive and their characteristics, although the time course may be quite variable, this phenomenon has been termed tumor progression by Foulds [15]. CR is defined as the disappearance of all target lesions and reduction of the short axes of target lymph nodes to < 10 mm. In the early stages of the tumor progression, there is a detachment of cancer cells from the primary tumor, followed by tumor cell adhesion to endothelial cells of venules in the target organs. Metastatic cells must act with the endothelium in three different stages of tumor progression: initially during the formation of blood vessels that enable tumor growth (vascularization), during the migration process that allows the passage from tissue into the bloodstream (intravasation), and finally during the process allowing extravasation into the target tissue [41-43]. Fludeoxyglucose F18 (FDG) positron emission tomography (PET) can be used in place of biopsy to verify CR when a residual mass is thought to represent scarring or fibrosis. PERCIST specifies that the SUL peak is to be obtained on the single most active lesion on each scan. After the extravasations occurs extracellular matrix invasion by tumor cells, these cells of primary lesions enter the lymphatics or the bloodstream depending on their anatomical location. Metastatic cancer cells require properties that allow them not only to adapt to a foreign microenvironment but also to subvert it in a way that is conducive to their continued proliferation and survival [36-38]. SUL peak is the average of the activity within a spherical region of interest measuring 1.2 cm in diameter (for a volume of 1 cm3) centered at the most active portion of the tumor. In the circulation, many tumor cells are eradicated by physical forces exerted on them to pass through the microvasculature of secondary organs, and immunological mechanisms of action of host defense. The SUL peak may be located in a different lesion on a follow-up scan because the current most avid lesion is to be measured. Furthermore, once inside the target tissue tumor cells must find favorable conditions for survival and proliferation [16-18].
These diets are based on enzymes and antioxidant substances in certain foods that are rich in components that collect above [91].They also have the ability to repair previous damage to cells, examples of antioxidants include (beta-carotene, lycopene, vitamins C, E, and A), and other substances. Additionally, the interval development of a malignant FDG uptake pattern is considered an indicator of PD unless it corresponds to an anatomically stable lesion. Using a concept similar to RECIST, it is also recommended that a sum of the activity of up to 5 target lesions (no more than 2 per organ) be measured as a secondary determinant of response. The biological characteristic that define tumor progression have been extensively described, although the underlying mechanisms are still not completely defined, however there are two theories have been proposed to explain how tumor cells invade secondary sites where metastasis occurs are the following [18-20]. Cellular interactions in the inflammatory reaction and spread tumorIn the early stages of inflammation, neutrophils are cells that migrate to the site of inflammation under the influence of growth factors, cytokines and chemokines, which are produced by macrophages and mast cells residing in the tissue [48]. Nutrients such as; green tea, flavonoids, vitamins C, E, and Beta-carotene in the carcinogen process, has been showed that have function in the elimination of carcinogenic factors, inhibition of pre-carcinogens and reparation of DNA damage. Future studies will show which of the 2 methods of response determination most accurately reflects treatment outcome.An alternative metric that can be used to determine FDG avidity according to the PERCIST criteria is total lesion glycolysis (TLG).
The first is similar to the inflammatory process by cell adhesion and migration, while the second involves the aggregation of circulating tumor cells, and that these cells blocked blood vessels. The mechanisms are diverse and range from inhibition to an active reaction of the immune system in general. This is a measure of the FDG uptake of the entire tumor above a pre-set threshold and is calculated by multiplying the mean SUV by total tumor volume (mL) (27, 56) TLG has been tested in several malignancies and has produced mixed results in comparison to SUV metrics, showing a weaker correlation with response in bone metastases in breast cancer patients (57) and in sarcomas(41, 58) but equal or better in esophageal, lung, gastric and rectal cancer (59) (60, 61). The installation of tumor cells in blood vessels of the organ target to invade, is related to phenotypic changes in the endothelium allowing vascular extravasation of blood circulation of leukocytes in the inflammatory reaction and, as hypothesized current of tumor cells with metastatic capacity. PERCIST suggests that SUL peak and TLG can be measured simultaneously in order to further evaluate the efficacy of TLG.
Endothelial BiologyThe endothelium is the thin layer of cells that lines the interior surface of blood vessels and lymphatic vessels, forming an interface between circulating blood or lymph in the lumen and the rest of the vessel wall. The phenomenon of extravasation in response to a tumor cell interaction cell endothelial or not allowing the passage of cells whether there are appropriate conditions for the invasion with varied morphology [53-55].Within the process of inflammation, a phenomenon is well-studied cell migration, which is the entrance of polymorphonuclear neutrophils and the vascular system.
For further specifics regarding PET scanning, such as information regarding patient preparation and scan acquisition, please see the PERCIST source article by Wahl et al.
The cells that form the endothelium are called endothelial cells, these cells have very distinct and unique functions that are paramount to vascular biology. This involves a sequential mechanism of recognition, contact formation, and migration mediated by adhesion molecules such as (ICAM-1, VCAM-1, E and P Selectins, Integrins) it has been demonstrated that some of these adhesion molecules, such as E-selectin are not only involved in inflammation, but also in tumor metastasis and play a significant role in cancer progression and metastasis, in some cases of colon cancer. Conclusions It is important to analyze the role of tumor-associated inflammatory microenvironment and has been identified that plays an important role in tumor progression. While no focus of unmeasurable disease can be used as a target lesion, the progression of such tumors can have an effect on the RECIST response assessment under the designation of unequivocal progression of nontarget lesions. These functions include fluid filtration, formation of new blood vessels in the angiogenesis, neutrophil recruitment. This microenvironment is composed of molecules that play an important role in inflammatory processes and chronic, and favor the invasion and metastasis process that triggers the death of many people with any cancer.The installation of tumor cells in blood vessels of the target organ to invade, is related to phenotypic changes in the endothelium allowing vascular extravasation of blood circulation of leukocytes in the inflammatory reaction and, as hypothesized current of tumor cells with metastatic capacity. In general, progression of nontarget lesions is to be estimated as a 20% increase in the sum of the greatest tumor diameters, which is calculated to be a 73% increase in volume, by the authors of the RECIST criteria (11). Complete metabolic response is defined as the disappearance of metabolic tumor activity in target and nontarget lesions. The endothelium acts as a semi-selective barrier between the vessel lumen and surrounding tissue, controlling the passage of materials and the transit of white blood cells, hormones into and out of the bloodstream. The expression of ICAM-1 has also proven to be a marker associated with an invasive phenotype [59].Hanahanan et al.
The phenomenon of extravasation in response to a cell interactions between tumor cells and endothelial cells or not allowing the passage of cells whether there are appropriate conditions for the invasion.Understanding the molecular basis of these interactions between metastatic cells and endothelial cells, will enable us to design strategies to interfere with this inter-cellular communication. Therefore, frank progression of bone metastases on any imaging modality can contribute to the classification of overall patient response through the designation of unequivocal progression (Fig. Residual FDG uptake can be seen despite effective therapy, possibly due to macrophage activity (62), and therefore PERCIST define complete metabolic response as a decrease in tumor SUL to the level of surrounding normal tissue. Excessive or prolonged increases in permeability of the endothelial monolayer, as in cases of chronic inflammation, may lead to tissue edema. It is important to recognize the tumor-associated inflammatory microenvironment and what is the contribution to tumor progression. It is also important in controlling blood pressure, blood coagulation, vascular tone, degradation of lipoproteins an in the secretion of growth factors and cytokines [24-25].
In recent years, it has been demonstrated that metastatic dissemination can be influenced by inflammatory-reparative processes [46]. The importance of these factors on endothelial activation being evaluated by reconstituting the mixture with cytokines, chemokines and growth factors recombinant depleted mixtures of tumor soluble factors of each of these proteins by specific monoclonal antibodies.Is important mention that during the inflammatory process macrophages, fibroblasts and endothelial cells generate a large amount of growth factors, cytokines, chemokines and reactive oxygen species (ROS) and nitrogen (RNS) that can cause DNA damage. In recent decades, it has become clear that the endothelium of venules and smaller capillaries, and lymphatic vessels play a central role in the process of tumor growth, dissemination of metastatic cells, which is accompanied by the development of a characteristic tumor vasculature and tumors formed by endothelial cells [26].
The interaction between these cell populations has been seen as part of a complex inflammatory microenvironment tumor-associated. These process allow the tissue damage continues chronic inflammation predisposes to malignancy.
In the absence of clear evidence of disease progression on the fused CT image, new FDG-avid foci are to be verified on a follow-up scan 1 month after discovery.
The constitutive phenotype of endothelial cellsQuiescent, resting endothelial cells in the adult form a highly heterogeneous cell population that varies not only in different organs but also in different vessel calibers within an organ. Stable metabolic disease is the absence of change or mild changes that do not meet the minimum qualifications of the other categories. Anatomic change in tumor size remains an important factor under PERCIST and is to be measured according to RECIST 1.1.
Inflammatory MicroenvironmentThe tumor microenvironment is composed of stromal fibroblasts, myofibroblasts, myoepithelial cells, macrophages, endothelial cells, leucocytes, and extracellular matrix (ECM) and soluble factors derived from tumor cells. This inflammatory environment surrounding a tumor promotes the breaking of the basal membrane, a process required for the invasion and migration of metastatic cells [60]. Tumor cells are also capable of produce cytokines and chemokines that facilitate evasion of the system immune and help to establishment and development of metastasis (Fig. Functional imaging criteria can also be considered for use in conjunction with anatomic criteria such as RECIST or MDA (Table 4). The increase of tumor-associated macrophages (TAMs) is associated with poor prognosis through various mechanisms: a) release by macrophage IL-10 and prostaglandin E2 which suppress antitumor response, b) easy to release angiogenic factors as VEGF, EGF, endothelin-2 and plasminogen activator promote tumor growth, c) to facilitate cell invasion metastasis by releasing matrix metalloproteinases and induce TNF production and vasodilatation enzyme nitric oxide synthase [61-62]. Figure 4.The tumor microenvironment and its role in promoting tumor growthCells grow within defined environmental sites and are subject to microenvironmental control.
During tumor development and progression, malignant cells escape the local tissue control and escape death. Diverse chemoattractant factors promote the recruitment and infiltration of these cells to the tumor microenvironment where they suppress the antitumor immunity or promote tumor angiogenesis and vasculogenesis.TNF is expressed in low amounts by other cells such as fibroblasts, smooth muscle cells and tumor cells, his target cell are primary endothelial cells, inducing their activation by changing expression levels of some membrane proteins, primarily as adhesion molecules E-selectin, ICAM-1 and VCAM-1 whose expression and synthesis, are regulated by the transcription factor kB nuclear. Activated endothelial phenotype induced by TNF and characteristics of the inflammatory response, have served to comparing the endothelial phenotype has been observed, is produced in response to contact with soluble tumor factors [63-64].
The nuclear factor kappa B (NF-kB) is a transcription factor paramount in regulation of inflammatory response genes Early involved in cell-cell interaction, communication intercellular recruitment or transmigration, amplification of signals pathogenic and acceleration of tumorigenesis [52-53,65].The study of tumor cells to modify their microenvironment has been a growing area of interest, which has identified the secretion of pro-inflammatory cytokines such as TNF, IL-6) and chemokines such as IL-8, it is interesting to note that these products are known modulators of endothelial function [53].
In recent years, it has been found that tumor cells secrete soluble factors, which modify the endothelial constitutive phenotype, and that exposure to these factors increase to a greater or less extent the capacity to adhere endothelial human tumor cells.
It has been recognized that these soluble factors released by tumor cells or non-tumor cells surrounding the tumor play an important role in tumor progression [66].Our group has shown that breast cancer cells, lymphomas, with high metastatic potentially induces a change in human endothelial cells (HUVECs) that is characterized by promoting a pro-adhesive endothelial phenotype, the expression of intercellular adhesion molecules (ICAM-1, VCAM-1 and E-Selectin) and the activation of NF-kB [66].
These studies include soluble factor leukemias (EUHE, Eusebia), cervical cancer (HeLa) and mammary gland cancer (MCF-7, ZR), oral cancer.
In all cases, we have used primary cultures of human endothelial cells (HUVECs), which have generated an in vitro model to study the tumor microenvironment.
This model is based on induction of a pro-adhesive endothelial phenotype that is associated with expression of adhesion molecules E-selectin, ICAM-1, VCAM dependent activation of NF-kB. These effects are considered essential in the process of adhesion and extravasation during the inflammatory reaction.Moreover, we have analyzed the biochemical composition of the soluble factors derived from tumor cells. Proteins such as 27, cytokines, chemokines and growth factors associated with the inflammatory reaction; (IL-1 ra, IL-1 beta, IL-2, IL-4, IL-5, IL-6, IL-7, IL-9, IL-10, IL-12, IL-13, IL-15, IL-16, TNF, IFN-gamma, IP-10,RANTES), (IL-8, Eotaxina, MCP-1, MIP-1 beta, MIP-1 alpha), (G-CSF, GM-CSF, PDGF, FGF, VEGF). The molecules identified most significant expression in breast carcinomas, were (VEGF, GM-CSF, IL-1ra, IL6, IL8, IP10, RANTES), which play an important role in endothelial cell activation [52-53,65-66].

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