Manometria Anorretal no Divertículo de Reto Anorectal Manometry in Rectal Diverticulum

ABSTRACT: Diverticulum located in the rectum is an exceptional find with fewer than 50 cases published. The etiology of thediverticulum of the rectum still has controversial aspects regarding its origin is congenital or acquired. Recently, alterations ofthe evacuative dynamic had been associated with the development of the disease. Nevertheless, until the present date, themanometric alterations in patients with diverticulum of the rectum were not studied. Objective: The aim of the present study isto demonstrate the results of electromanometric study carried out in a patient with isolated diverticulum of the rectum. Casereport: A man and a woman, 56 and 58 years-old, r espectively , wer e submitted to colonoscopy , barium enema, endor ectal ultrasoundand magnetic resonance of the pelvis to diagnose and document the presence of diverticulum located in the rectum. The patientswere submitted to manometry using catheter with eight-channel perfusion under water at 0.3 ml/min/channel, through pneumaticand hydraulic capillary infusion system. The anorectal manometry showed normally sphincter pressure profile both in rest andsqueezes pressure state, and did not find sphincter asymmetries. The anorectal inhibition reflex was present with normal valuesand the sensibility and rectal complaisance were between the normal limits. The vector volume analysis did not show anysignificant alterations and it was concluded by normal manometric anorectal study. Conclusion: The anorectal manometry studydid not demonstrate the existence of pressure disturbances in anorectal sphincter, enhancing the possibility that the rectaldiverticulum can be congenital, developing at points where there is major weakness of the rectal wall.Key words: Diverticulum; Diverticulum/congenital; Rectum; Manometry .