Malignant Tumors in the Rectum Simulating Solitary Rectal Ulcer Syndrome in Endoscopic Biopsy Specimens

Patients with solitary rectal ulcer syndrome (SRUS) frequently present with a mass that can be misinterpreted as cancer. In contrast, the occurrence and characteristics of SRUS-like histopathology produced by underlying malignancy have not been reported in detail. We report seven patients whose rectal mass that was induced by infiltrating carcinoma showed only histopathologic changes of SRUS on initial mucosal biopsy specimens. Carcinoma was...