Medical Dictionary Definitions A-Z List
Medical Dictionary Definitions A - Z - «S»:
Sapovirus: A virus, formerly called "Sapporo-like virus" (SLV) and sometimes referred to as classic or typical calicivirus, which can cause acute gastroenteritis ("stomach flu")....
Sapphism: Female homosexuality. Named after the poet Sappho who lived
on the Greek island of Lesbos (circa 600 BC). She was a lesbian by geography and sexual
orientation. Also called lesbianism. ...
Sapporo-like virus: See: Sapovirus....
Sarcoidosis: A disease of unknown origin that causes small lumps (granulomas) due to chronic inflammation to develop in a great range of body tissues. Sarcoidosis can appear in almost any body organ, but most often starts in the lungs or lymph nodes. It also affects the eyes, liver and skin; and les...
Sarcoma: One of a group of tumors usually arising from connective tissue. Most sarcomas are malignant. Many types are named after the type of cell, tissue, or structure involved, as in angiosarcoma, chondrosarcoma, fibrosarcoma, liposarcoma,and osteosarcoma....
Sarcoma botryoides: A malignancy of the cervix, vagina, or bladder in infants and young children that arises from embryonal rhabdomyoblasts (ancestral muscle cells). The tumor resembles a bunch of grapes. It has a generally good prognosis with conservative surgery followed by chemotherapy. Also know...
Sarcoma, Ewing: A type of bone tumor that occurs in children and adolescents, most often in the large bones of the arms and legs and the flat bones of the pelvis, spine and ribs. The tumor is caused by a chromosome abnormality, called a translocation (an exchange of material), most commonly between ...
Sarcoma, Kaposi: A relatively rare type of skin malignancy that tends to afflict elderly people or, especially, those with an abnormal immune system as in AIDS. Kaposi sarcoma is a highly vascular ("angioblastic") tumor of
the skin characterized by soft purplish plaques and papules that form nodule...
Sarcoma, metastatic: A sarcoma that is spreading
into other body tissues through the lymphatic system. The
most common site for metastatic sarcoma is the lungs, and
there are usually multiple lesions. Treatment is by
chemotherapy and surgery, but prognosis is poor....
Sarcoma, soft tissue
Sarcoma, soft tissue: See: Soft tissue sarcoma....
Sarcoma, synovial: See Synovial sarcoma....
SARS: Severe acute respiratory syndrome. A severe form of pneumonia which appeared in outbreaks in 2003. See: Severe acute respiratory syndrome....
SARS vaccine: A vaccine to protect against severe acute respiratory syndrome (SARS). The SARS epidemic surfaced early in 2003 and a crash program was soon begun to develop a vaccine directed against the coronavirus that causes SARS. No licensed vaccine had hitherto been developed for any human coron...
Sartorius muscle: The long band of muscle that
stretches from the calf to the pelvis. It moves the thigh
and, by extension, the leg.
Satellite DNA: DNA that contains many tandem (not
inverted) repeats of a short basic repeating unit. Satellite DNA is located at very
specific spots in the genome (on chromosomes 1, 9, 16 and the Y chromosome, the tiny short
arms of chromosomes 13-15 and 21 and 22, and near the centromeres of chromo...