Studies on Schistosomal Rectal and Colonic Polyposis

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  • Departments of Pathology, U.S. Naval Medical Research Unit No. 3, University of Arizona, College of Medicine, Departments of Surgery, Cairo University Faculty of Medicine, American Mission Hospital, Cairo, Egypt

Anatomic and digestion studies were done on rectal and colonic schistosomal polyps from 30 patients. Results indicate that schistosomal colonic polyposis is principally due to high, localized egg burdens of Schistosoma mansoni or S. haematobium resulting in damage to the muscularis mucosa of the colon. Furthermore, atypically focal oviposition by S. mansoni is probably more important in genesis of rectocolonic polyposis than is schistosomiasis haematobium.

Author Notes

Present address: Pathology Department, University of Texas Medical Branch, Galveston, Texas 77550.

Present address: Surgery Department, Cairo University, Faculty of Medicine, Cairo, Egypt.

Present address: Surgery Department, American Mission Hospital, Tanta, Egypt.