Atresia
As atresia or atresia ( modern Greek άτρητος , neo-Latin atretos "without opening") is the name given to the congenital or acquired closure or non-placement of hollow organs or natural body orifices.
Frequently affected organs are for example:
- Ear canal
- Intestinal ( Darmatresie : anal atresia , duodenal atresia , pyloric atresia )
- Esophagus ( esophageal atresia )
- Bile duct ( bile duct atresia )
- vagina
- urethra
- heart valves
- Blood vessels
- Choane (posterior opening of the nasal cavities into the nasopharynx )
Since an occlusion of the hollow organ significantly impairs the function, in most cases it is a serious clinical picture, which can also lead to death.
As follicular atresia refers to the destruction or the regression of follicles each stage at any time of female life. These follicles do not ovulate . However, follicular atresia is more pronounced at certain times ( fetal , postnatal , onset of menarche ).
See also
literature
- Elsevier, Lingen (Ed.): Medicine. Human. Health . Approved special edition. Elsevier (content), Munich; Helmut Lingen Verlag (Ed.), Cologne 2006.
- Roche Lexicon Medicine, 5th edition. Keyword atresia (online)
Web links
Wiktionary: Atresia - explanations of meanings, word origins, synonyms, translations
