| agenesis | <embryology> A condition in which a part of the body (such as an organ or a tissue) does not completely develop or fails to develop at all. (09 Oct 1997) |
|---|---|
| agenesis of corpus callosum | <radiology> Defect in dorsal portion of lamina reuniens, occurs about 10th - 12th week of gestation, may be complete or partial CT findings: parallel lateral ventricles, occipital horns dilated, deep falx, frontal horns C-shaped on coronal view associated with, Dandy-Walker cyst, encephalocele, Arnold-Chiari malformation, CNS lipoma (12 Dec 1998) |
| renal agenesis | <radiology> Associated with, duplicated vagina and/or uterus (mullerian duct anomaly), seminal vesicle cysts (12 Dec 1998) |
| gonadal agenesis | Congenital absence of essentially all gonadal tissue; the external genitalia and genital ducts are female, but if interstitial cells of Leydig are present, the external genitalia are commonly ambiguous and the genital ducts are female. See: gonadal dysgenesis. Compare: Klinefelter's syndrome, Turner's syndrome. Synonym: gonadal agenesis. (05 Mar 2000) |
| sacral agenesis | <radiology> Agenesis or hypoplasia of sacrum, part of caudal-regression syndrome, associated with maternal diabetes, with or without inherited, possible features: absent lower extremities, bladder/bowel impairment (12 Dec 1998) |
| thymic agenesis | The absence of the thymus, which may be associated with parathyroid agenesis in DiGeorge syndrome. (05 Mar 2000) |
| abdominal part of ureter | The part of the ureter between the renal pelvis and the brim of the pelvis. Synonym: pars abdominalis ureteris. (05 Mar 2000) |
| medially deviated ureter | <radiology> Retroperitoneal fibrosis, pelvic lipomatosis, abdomino-perineal resection, retrocaval ureter, normal variant (12 Dec 1998) |
| pelvic part of ureter | The part of the ureter between the brim of the pelvis and the urinary bladder; the upper pelvic portion of the embryologic urogenital sinus. Synonym: pars pelvina ureteris. (05 Mar 2000) |
| retrocaval ureter | <radiology> Ureter courses behind and medial to IVC, with or without ureteral obstruction subcardinal vein, IVC usually formed from supracardinal veins (12 Dec 1998) |
| retroiliac ureter | Congenital defect where the ureter passes deep to the iliac artery. (05 Mar 2000) |
| mucosa of ureter | The inner layer of the ureter. Synonym: tunica mucosa ureteris. (05 Mar 2000) |
| constrictions of ureter | Normal physiological narrowings of the ureter observable in a pyelogram; the uppermost occurs at the origin of the ureter from the renal pelvis; a second occurs as the ureter crosses the iliac vessels and pelvic brim; the inferiormost occurs as the ureter penetrates the wall of the urinary bladder. (05 Mar 2000) |
| muscular coat of ureter | Muscular layer of the ureteric wall. Synonym: tunica muscularis ureteris. (05 Mar 2000) |
| postcaval ureter | Congenital defect where the right ureter passes deep to the inferior vena cava on its descent to the bladder. (05 Mar 2000) |