| AT | abdominal thrusts; achievement test; Achilles tendon; Achard-Thiers [syndrome]; adaptive thermogenes... |
|---|---|
| TA | alkaline tuberculin; arterial tension; axillary temperature; tactile afferent; Takayasu arteritis; t... |
| TI | inversion time; temporal integration; terminal ileum; thalassemia intermedia; therapeutic index; tho... |
| CHARGE Associations | Coloboma Heart disease Atresia choanae Reta... |
| AVA | activity vector analysis; antiviral antibody; aortic valve area; aortic valve atresia; arteriovenous... |
| atresia | <medicine> Absence or closure of a natural passage or channel of the body; imperforation. Origin: NL, fr. Gr. Not perforated. Source: Websters Dictionary (01 Mar 1998) |
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| atresia folliculi | A normal process affecting the primordial ovarian follicles in which death of the ovum results in cystic degeneration followed by cicatricial closure. (05 Mar 2000) |
| atresia iridis | Congenital absence of the pupillary opening. Synonym: atretopsia. (05 Mar 2000) |
| biliary atresia | <embryology> A rare condition which is caused by the abnormal development of the bile ducts inside or outside the liver. The obstruction of bile flow from the liver can lead to cirrhosis of the liver if not treated. Symptoms include jaundice in the second to third week of life along with clay-coloured stools. See: newborn jaundice. (27 Sep 1997) |
| bronchial atresia | Severe focal narrowing or obliteration of a segmental or lobar bronchus, usually associated with distal air trapping. (05 Mar 2000) |
| vaginal atresia | Congenital or acquired imperforation or occlusion of the vagina, or adhesion of the walls of the vagina. Synonym: ankylocolpos, colpatresia. (05 Mar 2000) |
| choanal atresia | Congenital bony or membranous occlusion of one or both choanae, due to failure of the embryonic bucconasal membrane to rupture. (12 Dec 1998) |
| pulmonary atresia | Congenital absence of the normal valvular orifice into the pulmonary artery. This condition is characterised by cardiomegaly, reduced pulmonary vascularity, and right ventricular atrophy. (12 Dec 1998) |
| duodenal atresia | <radiology> Double bubble sign, polyhydramnios, associated with, Down syndrome, VATER syndrome NB: annular pancreas also may cause duodenal obstruction, and is associated with VATER syndrome (12 Dec 1998) |
| intestinal atresia | Congenital obliteration of the lumen of the intestine, with the ileum involved in 50% of the cases and the jejunum and duodenum following in frequency. It is the most frequent cause of intestinal obstruction in the newborn infant. Its aetiology may be related to failure of recanalization during early development or to some impairment of blood supply during intrauterine life. (12 Dec 1998) |
| oesophageal atresia | A congenital anomaly where the upper oesophagus ends (atresia) and does not connect with the stomach and the lower oesophagus connects to the trachea (tracheoesophageal fistula). A common complication seen shortly after birth is an aspiration pneumonia. Infants will demonstrate excessive salivation, gagging and coughing with feeding, poor feeding and a bluish discolouration to the skin (cyanosis). Treatment involves the surgical repair of the oesophagus before the child can take anything by mouth. (27 Sep 1997) |
| follicular atresia | <physiology> The degeneration and resorption of an ovarian follicle before it reaches maturity and ruptures. (12 Dec 1998) |
| laryngeal atresia | Congenital failure of the laryngeal opening to develop, resulting in partial or total obstruction at or just above or below the glottis. (05 Mar 2000) |