| ampulla of rectum | A dilated portion of the rectum just above the anal canal. Synonym: ampulla recti, ampulla of rectum. (05 Mar 2000) |
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| benign lymphoma of the rectum | A rectal polyp composed of lymphoid tissue with follicle formation, covered by mucosa. (05 Mar 2000) |
| rectum | <anatomy> The last portion of the large intestine (colon) that communicates with the sigmoid colon above and the anus below. (27 Sep 1997) |
| perineal flexure of rectum | The anteroposterior curve with convexity anteriorward of the last portion of the rectum. Synonym: flexura perinealis recti, anorectal angle, anorectal flexure. (05 Mar 2000) |
| per rectum | By or through the rectum, denoting a method of medication. Origin: L. (05 Mar 2000) |
| muscular coat of rectum | Muscular layer of the wall of the rectum. Synonym: tunica muscularis recti. (05 Mar 2000) |
| sacral flexure of rectum | The anteroposterior curve with concavity anteriorward of the first portion of the rectum. Synonym: flexura sacralis recti. (05 Mar 2000) |
| quantum rectum | See: Q.R. Origin: L. However much is correct (05 Mar 2000) |
| intestinum rectum | Straight intestine. See: rectum. (05 Mar 2000) |
| lymphatic follicles of rectum | Scattered collections of lymphoid tissue in the wall of the rectum. Synonym: lymphatic follicles of rectum. (05 Mar 2000) |
| anus | <anatomy> The distal or terminal orifice of the alimentary canal. (18 Nov 1997) |
| anus cerebri | Entrance to the cerebral aqueduct (of Sylvius) from the caudal part of the third ventricle. Synonym: aditus ad aqueductum cerebri, Bartholin's anus, opening to cerebral aqueduct. (05 Mar 2000) |
| anus, imperforate | Persistence of the anal membrane, so that the anus is closed. The defect is not always complete; sometimes a narrow opening permits the passage of the bowel contents. When completely imperforate, the anus is seen as a dimple (the proctodeal pit) in the skin of the perineum. The latter condition is often associated with atresia of the lower rectum. (12 Dec 1998) |
| anus vesicalis | Rectal emptying into the urinary bladder. (05 Mar 2000) |
| artificial anus | An opening into the bowel, usually in the right or left flank, as a result of a colostomy. (05 Mar 2000) |