A CASE OF RECTAL STENOSIS WITH ABNORMAL HYPERPLASIA OF THE ADIPOSE TISSUE IN THE PELVIC CAVITY AND SQUAMOUS METAPLASIA OF THE RECTUM

A 76 year-old woman was admitted on September 12, 1983, complaining of constipation and rectal incontinence since 1957. Severe stenosis of the rectum at 6cm oral from the anal verge and a large lipomatous tumor in the pelvic cavity were found. On November 14, 1983, amputation of the rectum with resection of the pelvic tumor and ileocecal resection were performed, because multiple circular stenoses were also observed in the distal ileum during the operation. Pathological examination revealed that the rectal stenosis was caused by a circular ulcer scar penetrating to the surrounding adipose tissue which was a part of the pelvic tumor. Broad squamous metaplasia of the rectum was observed at the anal side of the stenosis. The pelvic tumor was 15×9×6cm in size, and was composed of mature adipose tissue. No description of such an unusual case has ever been reported. The peculiar findings of this case were considered to result from a penetrating rectal ulcer scar of 26 years' duration.