Annular pancreas: An abnormal ring of pancreas that encircles the duodenum and often causes intestinal obstruction.
Nausea and vomiting are the usual symptoms and reflect the intestinal obstruction. Complete obstruction is usually evident in the newborn period. Partial obstruction may not present until later in childhood or adulthood.
Diagnostic tests include upper GI series, abdominal CT scan, and endoscopy. The treatment is surgical. Complications include peptic ulcer disease and perforation of the intestine.
“Annular” is the adjective for “annulus” (a little ring).
Annulus: A ringlike structure, or any body part that is shaped like a ring. Applied to many small ring-shaped structures. The base of a heart valve that supports the valve’s leaflets is called the annulus. A ring-shaped pancreas that encircles the duodenum is an annular pancreas. “Annulus” is a misspelling of the Latin “anulus” (a […]
- Anogenital tract
Anogenital tract: Angiogenital tract is a term used to refer to both the anus and genital tract. The genital tract encompasses the external and internal sex organs in both men and women. The term anogenital tract is often used in the categorization and/or description of disease processes that can affect both of these anatomic regions. […]
Anomaly: Any deviation from normal, out of the ordinary. In medicine, an anomaly is usually something that is abnormal at birth.
- Anomaly, congenital
Anomaly, congenital: A birth defect. A minor congenital anomaly is an unusual anatomic feature such as a short second toe that is of no serious medical or cosmetic consequence. By contrast, a major congenital anomaly is a defect such as a cleft palate that is of serious medical or cosmetic consequence.
Anomia: A problem with word finding. Impaired recall of words with no impairment of comprehension or the capacity to repeat the words. In “The Case of Anna H.” who had anomia, the neurologist/writer Oliver Sacks noted that: “When I showed her some kitchen matches, she recognized them at once, visually, but could not say the […]