Uninhibited Anal Sphincter Relaxation Syndrome

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Abstract
I report a new syndrome, in four patients, all male. Patients ranged from 36 to 43 years of age. The main complaint was fecal urgency with occasional fecal soiling. Physical examination as well as pressure and EMG studies of anal sphincters and levator ani muscle were all normal. The only positive finding was an abnormal rectoinhibitory reflex. The external anal sphincter did not contract either reflexively or voluntarily on rectal distension, leaving the relaxing internal sphincter unprotected and uncontrolled. The patients could not oppose the urge to defecate if conditions are inopportune, with resulting urgency and occasional fecal soiling. The cause is unknown, but biofeedback effected improvement in all four cases.

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