Anesthetic, local: An anesthetic that causes loss of feeling in a limited part of the body.
Anetoderma: An area of slack “baglike” skin due to a local absence or loss of elastic fibers in the skin. The skin affected by anetoderma often occurs in multiple local areas that typically have distinct borders from normal skin (circumscribed). The skin in these areas is soft, thin, and wrinkled, sometimes with patches that bulge […]
Aneuploidy: A condition in which a person has one or a few chromosomes above or below the normal chromosome number. For example, three copies of chromosome21, which is characteristic of Down syndrome, is a form of aneuploidy.
A localized widening (dilatation) of an artery, a vein, or the heart. At the point of an aneurysm, there is typically a bulge. The wall of the blood vessel or organ is weakened and may rupture.
- Aneurysm, abdominal
Aneurysm, abdominal: An aneurysm situated within the abdomen (belly). An aneurysm is a localized widening (dilatation) of an artery, vein, or the heart. At the area of an aneurysm, there is typically a bulge and the wall is weakened and may rupture. The word “aneurysm” comes from the Greek “aneurysma” meaning “a widening.” See: Aneurysm, […]
- Aneurysm, berry
Aneurysm, berry: A small aneurysm that looks like a berry and classically occurs at the point at which a cerebral artery departs from the circular artery (the circle of Willis) at the base of the brain. Berry aneurysms frequently rupture and bleed.