Abstract
A 57-year-old woman was admitted to our hospital because of constipation and narrowing of the stool. The colonoscopy demonstrated rectal stenosis and multiple elevated lesions of the rectum, but the rectal mucosa was smooth. A biopsy was performed and histological studies revealed a concentration of poorly differentiated adenocarcinoma cells with signet ring cells at the lamina propia mucosae and submucosa. Because the epithelium showed no atypia, we explored the origin in the sense that might be metastatic tumor. Coexisting gastric cancer type 4, which was diagnosed by gastrointestinal endoscopy, was considered to the primary lesion. If we detect rectal stenosis with multiple elevated lesions, it is important to consider the possibility of metastatic cancer since a histological study for metastatic cancer of the rectum was frequently negative.
