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Terms that are on use on this site as well as general cancer-related words and definitions.
There are 81 entries in this glossary.
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| Term |
Definition |
| randomized |
A radomized clinial trial is a study in which the participants are assigned by chance (by a flip of the coin; which today is done by a computer flipping the coin for researchers) to separate groups that compare different treatments; neither the researchers nor the participants can choose which group. Using chance to assign people to groups means that the groups will be similar and that the treatments they receive can be compared objectively. At the time of the trial, it is not known which treatment is best. It is the patient's choice to be in a randomized trial.
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| red cells |
Red cells circulate in the blood stream and carry oxygen. If the red blood cell count is low, the condition is called anemia. Weakness and fatigue are common symptoms of anemia. Chemotherapy and radiation therapy can result in lowered red blood cell counts.
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| remission |
The cancer, after treatment, is not detectable or not progressing based on appropriate physical examination, blood tests and radiology tests.
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| response |
A determination of the effectiveness of treatment. This usually requires a measurable amount of cancer( by exam or test) to see if it has become stable, reduced or eliminated. A complete clinical response means that a previously measurable cancer has gone away with treatment. It cannot be detected by examination, blood tests, x-ray or scan. A partial response means that the measurable amount of cancer has decreased by 50%. If there has been minimal reduction in size or if the disease has not changed in size, it is known as stable disease.
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| sarcoma |
A cancer of supporting structures such as bone, muscle, cartilage and fat. Gynecologic sarcomas are unusual, but can affect any gyn organ. Most often it affects the uterus, although this is still relatively unusual. In some cases mixed elements of a malignancy are present in a uterus or ovary, involving both sarcoma and carcinoma. This is known as a Mixed Mullerian Tumor. Many of these sarcomas or mixed tumors can be very aggressive, even if caught early.
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| screening |
A screening test is one which is done on "normal" people without symptoms or physical findings in order to find hidden disease, in this case early or hidden cancer. For gynecologic cancers the only good screning tools available are for cervical cancer, those being the Pap smear and newer technologies like visual tests(PapSure) and viral tests(DiGene). These tests DO NOT test for ovarian or endometrial (uterine) cancer. There are no good screening tests available yet for uterine or ovarian cancer.
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| sensitivity |
Refers to the probability or chance that a test will be positive when the disease that is being tested for is present. (see SPECIFICITY, POSITIVE PREDICTIVE VALUE and NEGATIVE PREDICTIVE VALUE).
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| specificity |
Refers to the probability or chance that a test will be negative when the disease that is being tested for is not present. (see SENSITIVITY, NEGATIVE PREDICTIVE VALUE and POSITIVE PREDICTIVE VALUE.
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| squamous |
Superficial cells covering surfaces, like skin or vagina. Usually used as a general term which describes cancer of squamous epithelium. Most commonly, squamous cancers in gynecology are cervical, vaginal and vulvar. (see EPITHELIUM and SQUAMOUS EPITHELIUM)
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| squamous cells |
Pronounced "squay-mus", this is the outermost layer of skin, which is 12-24 cell layers thick, located on a microscopic basement membrane. The cells closest to the basement membrane are large, round and have a large nucleus. The cells closest to the surface are flattened and have a small dense nucleus. On exposed skin the outermost layer of cells have lost their nucleus and are filled with keratin to form a protective keratin layer. The word squamous means flattened and refers to these flattened cells. In normal squamous epithelium, there is a regular progression of the shape of the cells from large and round at the basement membrane to flattened at the surface. There is also a progression in nuclear change from large at the basal layer to small and dense toward the surface and absent at the outermost layer of exposed skin. A dysplasia is a disorder of this maturation progression. (see DYSPLASIA).
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| stage |
A determination of the extent of a newly diagnosed cancer. Mainly, is the cancer still localized to the organ of origin or has it spread, and how far? Each type of cancer has its own staging criteria. A commonly used staging system in gynecology (FIGO) assigns the cancer to one of four stages. Stage I refers to a cancer localized to the site of origin. Stage II is a cancer that has spread into adjacent tissue. Stage III cancers have spread within the region. Stage IV indicates distant spread or involvement of another organ system. There are usually substages for each of the four common stages. The official staging system used by cancer registries is the TNM system. T indicates the status of the primary tumor and is subdivided into T1, T2, T3 and T4, depending on the size and extent of the primary tumor. N indicates the status of the regional lymph nodes and is subdivided into Nx, No, N1, and N2. M indicates distant metastases, Mo-none, M1, - present. Some cancers are assigned a stage by examination and x-ray tests. Others require a surgical exploration. Staging is important because it indicates the appropriate treatment, allows evaluation of treatment results, and can compare results from different types of treatment.
FIGO and TNM staging systmes are cross-referenced by most pathologists and cancer registries.
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| stem cell |
The stem cell in the bone marrow is one that gives rise to the blood cells. The stem cells produce both red and white blood cells. If the stem cells are destroyed during chemotherapy then there will be no white blood cells to combat infection, which may be fatal. If some stem cells can be removed prior to chemotherapy, then huge doses of chemotherapy, that would otherwise be fatal, can be given and the stem cells replaced after the chemotherapy. It is called a stem cell because it has the ability to become any of the blood elements. The other cells in the bone marrow have lost this ability and can make only a specific type of blood cell element. Stem cell transplant for solid tumors, especialy for gynecologic tumors, has been all but abandoned. There is no apparent increase in cure rates and the treatment is extremely toxic.
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| stoma |
Pronounced "stow ma", is an opening at the skin for either urine or stool, created surgically when bowel or urinary bladder needs to be removed during treatment. A colostomy is one example. Some are reversible, some are permanent depending upon what was removed.
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| stomach |
After food is swallowed it travels down the esophagus to the stomach, which is the initial storage and digestive bag for food. From there the food is transferred to the small intestine, then the large instestine or colon, and out through the rectum and anus.
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| stroma |
Pronounced "strow ma", this is the supporting tissue around or beneath an epithelium. The skin is an epithelium supported by the fibrous fatty stroma beneath it. (see EPITHELIUM)
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