Arm: In popular usage, the appendage that extends from the shoulder to the hand. However, the medical definition refers to the upper extremity extending from the shoulder only to the portion of the elbow, excluding the forearm, which extends from the elbow to the wrist. The arm contains one bone: the humerus.
ARMD: Age-related macular degeneration (which may also be abbreviated as AMD).
- Armed Forces Institute of Pathology
Armed Forces Institute of Pathology: An agency of the US Department of Defense specializing in pathology consultation, education and research. The Armed Forces Institute of Pathology (AFIP) consults on many cases, including difficult, unusual, or rare tumors sent for an expert “second opinion.” The AFIP is located in Washington, DC.
Aromasin: Brand name of exemestane, an oral antiestrogen. Aromasin inhibits the enzyme aromatase in the adrenal glands that produces the estrogens (estradiol and estrone) and thereby lowers their levels. It works by decreasing the amount of estrogen the body makes. This can slow or stop the growth of many types of breast cancer cells that […]
Aromatase: An enzyme involved in the production of estrogen that acts by catalyzing the conversion of testosterone (an androgen) to estradiol (an estrogen). Aromatase is located in estrogen-producing cells in the adrenal glands, ovaries, placenta, testicles, adipose (fat) tissue, and brain. The growth of some breast cancers is promoted by estrogens. For example, the drug […]
- Aromatase inhibitor
Aromatase inhibitor: A drug that inhibits the enzyme aromatase and by that means lowers the level of the estrogen estradiol. Aromatase inhibitors represent a class of antiestrogens. Aromatase catalyzes the conversion of testosterone (an androgen) to estradiol (an estrogen) in many tissues including the adrenal glands, ovaries, placenta, testicles, adipose (fat) tissue, and brain. Estrogen […]