Ischium
The bone that makes up the lower-rear part of the pelvis. Also known as ischiopubic bar and ischiopubic bone.
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- Islet cell cancer
Gastrinomas — produce the hormone gastrin and cause the Zollinger-Ellison syndrome of unrelenting peptic ulcers, diarrhea, and gastric hyperacidity. Insulinomas — are characterized by hypoglycemia (low blood sugar) caused by inappropriate secretion of insulin by the tumor. These tumors may occur alone or as part of a MEN (multiple endocrine neoplasia) syndrome. Glucagonomas — produce […]
- Islet cell tumor
A tumor that arises from the islet cells of the pancreas. The islet cells normally produce insulin and other hormones, and so the tumors frequently, but not always, produce one of these hormones. Islet cell tumors can be benign or malignant and generally cause symptoms related to the hormone produced by the tumor. Specific types […]
- Islets of Langerhans
alpha cells that make glucagon, which raises the level of glucose (sugar) in the blood; beta cells that make insulin; delta cells that make somatostatin which inhibits the release of numerous other hormones in the body; and PP cells and D1 cells, about which little is known. Degeneration of the insulin-producing beta cells is the […]
- Iso-
Equal, like, or similar. Iso- is much used in medicine and science as, for example, in isotonic solution (a solution that has the same salt concentration as cells and blood), isotope (a form of a chemical element with the same atomic number as another element but having a different atomic mass), isocellular (composed of cells […]
- Isocellular
Composed of cells of the same size and type. Isocellular is a Greek-Latin hybrid term compounded from the Greek iso- meaning “equal or like” + the Latin cellula, the diminutive of cella, a storeroom.