from The American Heritage® Dictionary of the English Language, 4th Edition
- n. The absence or closure of a normal body orifice or tubular passage such as the anus, intestine, or external ear canal.
- n. The degeneration and resorption of one or more ovarian follicles before a state of maturity has been reached.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. A condition in which a body orifice or passage in the body is abnormally closed or absent.
from the GNU version of the Collaborative International Dictionary of English
- n. Absence or closure of a natural passage or channel of the body; imperforation.
from The Century Dictionary and Cyclopedia
- n. The state or condition of being closed or imperforate; specifically, absence of a natural opening or passage: chiefly used in medicine and surgery.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. an abnormal condition in which a normal opening or tube in the body (as the urethra) is closed or absent
The purpose of surgery for children with biliary atresia is to restore bile flow.
Biliary atresia is associated with several malformations including a malformation of the spleen, i.e. asplenia or polysplenia.
Biliary atresia is a serious liver disorder that occurs shortly after birth when a newborn's bile ducts (the tubes that carry bile from the liver) become blocked.
The surgery for biliary atresia is called a Kasai operation or hepatoportoenterstomy.
In general the long-term outlook for biliary atresia is excellent.
Now with the Kasai hepatoportoenterstomy and improvements in liver transplantation, the first generation of patients with biliary atresia is reaching adulthood.
Tricuspid atresia is often associated with pulmonary stenosis or narrowing of the pulmonary valve, or pulmonary atresia where the pulmonary valve is completely closed.
Tricuspid atresia is a single-ventricle lesion, because the heart has only one functioning ventricle (the left ventricle).
Tricuspid atresia is usually diagnosed a few hours or days after birth.
Although biliary atresia is rare, its geographic reach is wide.