Rectal non-Hodgkin's lymphoma: a clinicopathologic study and review.

A total of 11 patients with lymphomatous involvement of the rectum were seen at Henry Ford Hospital between 1964 and 1987. Eight of these patients had primary rectal lymphoma and three had secondary rectal lymphoma. These patients' clinical presentation and course as well as pathological findings are described and compared with cases previously reported. As identified in ours and others' series, rectal lymphomas are associated with the acquired immunodeficiency syndrome and tend to have a B-cell phenotype.