| anorectal flexure | The anteroposterior curve with convexity anteriorward of the last portion of the rectum. Synonym: flexura perinealis recti, anorectal angle, anorectal flexure. (05 Mar 2000) |
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| 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) |
| sacral flexure of rectum | The anteroposterior curve with concavity anteriorward of the first portion of the rectum. Synonym: flexura sacralis recti. (05 Mar 2000) |
| anorectal | <anatomy> Pertaining to the anus and rectum or to the junction region between the two. (18 Nov 1997) |
| anorectal abscess | <surgery> An abscess that forms adjacent to the anal opening. Symptoms include a tender swelling adjacent to the anus and pain on defecation. (27 Sep 1997) |
| anorectal angle | The angle formed by the junction of the rectum with the anus; may be important in maintenance of continence. Synonym: perineal flexure of rectum. (05 Mar 2000) |
| anorectal fistula | <surgery> An abnormal tube-like passage connecting the anal canal and the rectum. May result from injuries, abscesses or inflammatory processes (for example cancer, Crohn's disease). (27 Sep 1997) |
| anorectal junction | Transition from rectum to anal canal; corresponds to the perineal flexure, or the level at which the gut perforates the pelvic diaphragm; here the rectal ampulla narrows abruptly into a narrow slip. (05 Mar 2000) |
| anorectal lymph nodes | Nodes located on either side of the rectum; they send efferents to the middle rectal and superior rectal nodes. Synonym: nodi lymphatici pararectales, nodi lymphatici anorectales, anorectal lymph nodes. (05 Mar 2000) |
| anorectal spasm | Painful spasm of the muscle about the anus without known cause; probably a neurosis. Synonym: anorectal spasm. (05 Mar 2000) |
| anorectal syndrome | <syndrome> Soreness, burning, itching, or other irritation of the rectum together with redness about the anus, and sometimes accompanied by diarrhoea, occurring as a toxic effect of the oral administration of certain broad spectrum antibiotics. (05 Mar 2000) |
| ampulla of rectum | A dilated portion of the rectum just above the anal canal. Synonym: ampulla recti, ampulla of rectum. (05 Mar 2000) |
| 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) |
| per rectum | By or through the rectum, denoting a method of medication. Origin: L. (05 Mar 2000) |