[The first case of cap polyposis in Denmark].

ABSTRACT

Cap polyposis (CP) is characterized by the presence of inflammatory polyps mainly involving the rectosigmoid. It primarily causes mucous to bloody diarrhoea and is often misdiagnosed initially. We report the first case in Denmark with multiple polyps in the rectosigmoid causing constipation in between periods of mucous and bloody diarrhoea. He was initially misdiagnosed as having ulcerative colitis with pseudopolyps. Due to insufficient effect of medical treatment biopsies from the polyps were obtained. They showed typical histological signs of CP. He was successfully treated by rectosigmoid resection.