[Isolated malignant lymphoma of the rectum(author's transl)].

A case of primary and isolated, diffuse reticulosarcoma of the rectum is reported. There has been a history of blood diarrhea for 12 years in a 60 years old man, with no change in his general condition. Treatment with cyclophosphamide was started and maintained for two and a half years with complete local regression, and very good clinical results.