| exstrophy of the cloaca | A developmental anomaly in which an area of intestinal mucosa is interposed between two separate areas of the urinary bladder. Synonym: ectopia cloacae. (05 Mar 2000) |
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| bladder exstrophy | Congenital eversion of the urinary bladder. It is characterised by the absence of a portion of the lower abdominal wall and the anterior vesical wall, with eversion of the posterior vesical wall through the deficit. (12 Dec 1998) |
| persistent cloaca | A condition in which the urorectal fold has failed to divide the cloaca of the embryo into rectal and urogenital portions. Synonym: sinus urogenitalis, urogenital sinus. (05 Mar 2000) |
| cloaca | 1. <zoology> A common passage for faecal, urinary and reproductive discharge in most lower vertebrates. 2. <embryology> The terminal end of the hindgut before division into rectum, bladder and genital primordia. 3. <pathology> An opening in the involucrum of a necrosed bone. (18 Nov 1997) |
| cloacal exstrophy | Congenital anomaly with two exstrophied bladder units separated by an exstrophied segment of intestine, which is usually caecum, receiving ileum superiorly and continuing distally to blend microcolon. A number of variants of anatomic disarray can occur. (05 Mar 2000) |
| ectodermal cloaca | The proctodeum of the embryo. (05 Mar 2000) |
| endodermal cloaca | Terminal portion of the hindgut internal to the cloacal membrane of the embryo. (05 Mar 2000) |
| exstrophy | <medicine> The eversion or turning out of any organ, or of its inner surface; as, exstrophy of the eyelid or of the bladder. Origin: Gr. To turn inside out; = out + to turn. Source: Websters Dictionary (01 Mar 1998) |
| exstrophy of the bladder | A congenital gap in the anterior wall of the bladder and the abdominal wall in front of it, the posterior wall of the bladder being exposed. Synonym: ectopia vesicae. (05 Mar 2000) |