[Anorectal stenosis caused by suppositories of dextropropoxyphene and paracetamol (Diantalvic)].

Occasionally, administration of medical substances per annum may result in serious local lesions. The authors report the case of a 58 year-old woman presenting ulcerative and stenosing lesions of the anal canal which led to abdominoperineal resection. History revealed the administration of two suppositories daily, each containing an association of dextropropoxyphene and paracetamol, during seven years because of a cervical pain. Fourteen similar cases have been found in the literature, underlining the difficulties in clinical and pathological diagnosis. The exact mechanism of these lesions remains unknown.