Abstract
Colonoscopy was performed on a 55-years- old female for examination of sudden onset bloody mucus diarrhea. The colonoscopic finding revealed whitish capped polypoid lesions in the rectum. Histology of the polyps showed prominent fibrin exudates in the caps and inflammatory cell infiltration in the lamina propria. Cap polyposis was diagnosed from the above findings. After eradication therapy for Helicobacter pylori, both the symptoms and the colonoscopic findings of this patient almost disappeared. To date, there are only 12 cases reported on the eradication therapy for Helicobacter pylori to treat cap polyposis. Here, we report a case of cap polyposis which is successfully treated by the eradication of Helicobacter pylori.