September 14, 2005
Endoscopic evaluation of a 61-year-old man hospitalized with a 4-month history of rectal bleeding, mucous discharge, and change in bowel habits revealed this large, sessile villous adenoma. The lesion occupied half the circumference of the bowel wall in the distal sigmoid colon, 25 cm from the anal verge. Examination of biopsy specimens showed benign villoglandular adenoma with atypia, with no invasive carcinoma. Sigmoid resection was carried out, and the patient recovered well.