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Topic: Tumor


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  Tumor - Wikipedia, the free encyclopedia
Tumor meaning swelling is one of the five classical characteristics of inflammation.
This means that the prevalence of tumors increases strongly with increasing age.
Tumors are caused by mutations in DNA of cells.
en.wikipedia.org /wiki/Tumor   (1071 words)

  
 National Brain Tumor Foundation   (Site not responding. Last check: 2007-10-22)
Pathologists classify primary brain tumors into two groups: the gliomas, composed of "glial" cells that invade the neural tissue surrounding them; and the nonglial tumors, which are not composed of glial cells and compress, rather than invade, the neighboring brain tissue as they grow.
Some primary brain tumors are called benign because their rate of growth is so slow that many years may pass before the tumor grows large enough to compress functional areas of the brain, causing symptoms that require treatment.
A new tumor that grows in the same place as the original one is also called a "recurrent" tumor because it is difficult, often impossible, to distinguish its cells from the cells of the original tumor.
www.braintumor.org /patient_info/surviving/faq   (2346 words)

  
 Brain Tumor- Biotechnology Encyclopedia
Tumors in the brain are either benign or malignant.
Tumors located in distant locations may affect the nerve cells and cause neurologic changes by mechanisms other than direct invasion of brain tissue.
In the latter mechanism, antibodies developed to kill tumor cells are suggested to accidentally (probably due to molecular similarities between tumor cells and normal nerve cells) bind neurons and destroy them.
www.biotech100.com /biotechnology_encyclopedia/brain_tumor.htm   (809 words)

  
 Tumor markers
Tumor markers are measurable biochemicals that are associated with a malignancy.
Elevated AFP typically indicates a primary liver tumor or a germ cell tumor of the ovary or testicle.
Tumors that metastasize to the liver cause increases in serum alkaline phosphatase, gamma-glutamyltransferase, and transaminases.
www.healthatoz.com /healthatoz/Atoz/ency/tumor_markers.jsp   (3350 words)

  
 MedlinePlus Medical Encyclopedia: Brain tumor - children
Tumors may be confined to a small area, invasive (spread to nearby areas), benign (not cancerous), or malignant (cancerous).
Tumors are located in the ventricles of the brain and obstruct the flow of cerebrospinal fluid (CSF).
Tumors that are deep or that infiltrate brain tissue may be debulked (reducing the tumor's size and mass) rather than removed.
www.nlm.nih.gov /medlineplus/ency/article/000768.htm   (1183 words)

  
 MedlinePlus Medical Encyclopedia: Tumor
Tumors are classified as either benign (slow-growing and often harmless depending on the location) or malignant (faster-growing and likely to spread to other parts of the body and cause problems).
If the tumor is benign (meaning it has no potential to spread) and is located in a "safe" area where it will not cause symptoms or disturb the proper functioning of the organ, sometimes no treatment is needed.
Benign tumors of the brain may be removed because of their location or harmful effect on the surrounding normal brain tissue.
www.nlm.nih.gov /medlineplus/ency/article/001310.htm   (953 words)

  
 Oncology - Wilms Tumor
Wilms tumor, also called nephroblastoma, is a malignant (cancerous) tumor originating in the cells of the kidney.
Tumor suppressor genes usually suppress the growth of tumors and control cell growth.
A biopsy of the tumor to evaluate cells, extent of disease, and diagnosis.
uuhsc.utah.edu /healthinfo/pediatric/oncology/wilms.htm   (1114 words)

  
 Brain tumor - children
Brain tumors are classified depending on the exact site of the tumor, the type of tissue involved, benign or malignant tendencies of the tumor, and other factors.
Tumors may occur at any age, but many specific tumors have a particular age group in which they are most common.
Childhood nervous system tumors may be classified as either infratentorial (located below the tentorium cerebelli), meaning they are in the back third of the brain, or as supratentorial, meaning they are in the front two-thirds of the brain.
www.umm.edu /ency/article/000768.htm   (793 words)

  
 National Cancer Institute - Dictionary of Cancer Terms
A tumor of the thymus, an organ that is part of the lymphatic system and is located in the chest, behind the breastbone.
T describes the size of the tumor and whether it has invaded nearby tissue, N describes any lymph nodes that are involved, and M describes metastasis (spread of cancer from one body part to another).
Taken from an individual's own tumor tissue; may be used in the development of a vaccine that enhances the body's ability to build an immune response to the tumor.
www.cancer.gov /dictionary/db_alpha.aspx?expand=t   (5709 words)

  
 Rat & Mouse Gazette: Tumors in Rats
Along with respiratory infections, tumors are one of the most common health problems and causes of death in rats, especially in females.
Benign tumors are almost always encapsulated in a membrane and separate from nearby tissues, and therefore easily removed by surgery.
Unfortunately, this rat was euthanized due to complications five days after a second surgery.Other tumors I've seen include one, probably cancer, of the ovaries, one involving the urinary tract, and a malignancy that arose in a rat after I had earlier done two surgeries in the same location to remove benign mammary tumors.
www.rmca.org /Articles/tumors.htm   (1355 words)

  
 Tumor Immunology
Tumors vary greatly in their immunogenicity, and even tumors with antigens which can be recognized by the host immune system can evade immune elimination.
Lack of tumor rejection by intact immune systems is not always due to the absence of antigens which can be recognized or to the absence of T cells which can recognize those antigens.
Introduction of irradiated tumor cells transfected with genes for cytokines that stimulate immunity or antisense genes for inhibitory cytokines are undergoing clinical trials.
microvet.arizona.edu /Courses/MIC419/Tutorials/tumor.html   (1241 words)

  
 GBM - MGH Brain Tumor Center
Once a brain tumor is detected on a CT or MRI scan, a neurosurgeon obtains tumor tissue for examination by a neuropathologist (a biopsy).
When a tumor is located in a sensitive area of the brain, a biopsy is performed with a small needle, thereby avoiding further damage to brain function.
Whereas for most tumors radiation is given prior to consideration of chemotherapy, chemotherapy is often administered prior to radiation therapy for patients with anaplastic oligodendrogliomas.
brain.mgh.harvard.edu /Glioblastoma.htm   (3043 words)

  
 Brain tumor
A brain tumor is a mass or growth of abnormal cells in the brain.
Tumors in the brain typically are categorized as primary or secondary.
Primary brain tumors originate in the brain or close to it, such as in the skull, brain membranes (meninges), cranial nerves, or pituitary or pineal gland.
www.cnn.com /HEALTH/library/DS/00281.html   (2874 words)

  
 Bonetumor.org - The Web's Most Comprehensive Bone Tumor Resource
It is a slowly progressing tumor with well-differentiated cells that produce collagen.
The oval tumor is often found in the metaphysis aligned with the long axis of the bone.
The edge of the tumor may resemble fibrous dysplasia, but under polarized light lamellar structures are obvious.
bonetumor.org /tumors/pages/page54.html   (366 words)

  
 Wilms' tumor
Wilms' tumor is a cancerous tumor of the kidney that usually occurs in young children.
Rarely, a Wilms' tumor is diagnosed after there has been bleeding into the tumor, resulting in sudden swelling of the abdomen and a low red blood cell count (anemia).
Stage II tumors involving a favorable histology (cell characteristics) are usually treated with the same therapy as Stage I. Stage III tumors with favorable histology are usually treated with a combination chemotherapy with doxorubicin, dactinomycin, and vincristine along with radiation therapy to the abdomen.
www.healthatoz.com /healthatoz/Atoz/ency/wilms_tumor.jsp   (1719 words)

  
 Marker, tumor definition - Medical Dictionary definitions of popular medical terms   (Site not responding. Last check: 2007-10-22)
Marker, tumor: Tumor markers are substances that can be detected in higher-than-normal amounts in the blood, urine, or body tissues of some patients with certain types of cancer.
A tumor marker may be made by a tumor itself or by the body in response to the tumor.
Although tumor markers are typically imperfect as screening tests to detect occult (hidden) cancers, once a particular tumor has been found with a marker, the marker may be a marvel as a means of monitoring the success (or failure) of treatment.
www.medterms.com /script/main/art.asp?articlekey=8728   (277 words)

  
 Tumor Markers
Tumor markers are substances, usually proteins, that are produced by the body in response to cancer growth or by the cancer tissue itself.
Some tumor markers are specific for one type of cancer, while others are seen in several cancer types.
While not considered tumor makers, there are tests that look for these mutations in order to estimate the risk of developing a particular type of cancer.
www.labtestsonline.org /understanding/analytes/tumor_markers/glance.html   (298 words)

  
 Cancer Information, Research, and Treatment for all Types of Cancer | OncoLink
Clear cell sarcoma of the kidney, rhabdoid tumor of the kidney, neuroepithelial tumor of the kidney, and cystic partially-differentiated nephroblastoma (see descriptions in the Cellular Classification section) are childhood renal tumors unrelated to Wilms' tumor.
Gross or microscopic tumor remains postoperatively (e.g., tumor cells are found at the margin of surgical resection on microscopic examination).
The tumor is removed in more than one piece (e.g., tumor cells are found in a separately excised adrenal gland; a tumor thrombus within the renal vein is removed separately from the nephrectomy specimen).
www.oncolink.upenn.edu /types/article.cfm?c=14&s=55&ss=440&id=9129   (8452 words)

  
 Tumor definition - Cancer information on MedicineNet.com   (Site not responding. Last check: 2007-10-22)
Tumors are a classic sign of inflammation, and can be benign or malignant (cancerous).
For example, a medulloblastoma is a tumor that arises from embryonic cells (a blastoma) in the inner part of the brain (the medulla).
Tumor marker tests and imaging may be used; some tumors can be seen (for example, tumors on the exterior of the skin) or felt (palpated with the hands).
www.medterms.com /script/main/art.asp?articlekey=5863   (361 words)

  
 Benign Brain Tumor | Comprehensive Cancer Center of Wake Forest University
Acoustic neuroma is a benign brain tumor of the eighth cranial nerve in the brain.
Treatment has resulted in elimination of further tumor growth or reduction in tumor size in more than 90 percent of patients.
As a national leader in cancer care and research and ranked among the best treatment facilities in the country, it is one of only 38 cancer centers in the nation designated by the National Cancer Institute (NCI) as a Comprehensive Cancer Center.
www1.wfubmc.edu /cancer/benign-brain-tumor.html   (284 words)

  
 Brain tumors: brain tumor treatment, symptoms & malignant brain tumor support.
Being diagnosed with a brain tumor is a difficult experience.
This web site can help you cope by offering information about brain tumors and treatment, malignant and benign brain tumors, brain tumor medical centers, the latest brain tumor clinical trials as well as connecting you to a network of brain tumor survivors.
And find out how you can support brain tumor research by participating in Angel Adventures across the country.
www.braintumor.org   (192 words)

  
 Cat Sickness,Natural,Vitamins,Herbal Cat Vet Health Products   (Site not responding. Last check: 2007-10-22)
Additionally, when a tumor is cut out, pain is endured, the skin is cut, muscles and other tissues are cut, anesthesia will have to be used of course, antibiotics are normally used and continued use is recommended.
Tumor Supplement F™ was formulated for fatty tumors and Tumor Supplement R™ was formulated for other types of tumors that develop specifically in the feline body.
When you think the tumor is gone---this might be a month or it might take six months or even more (how long do you suppose it took to develop in the first place?)--then you squirt for another two to three more weeks to make sure the root of the tumor is gone internally as well.
www.petmedicinechest.com /feline/discussions/tumortext.asp   (2490 words)

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