Proximal extension of cap polyposis confirmed by colonoscopy

Abstract

Cap polyposis is a rare condition that affects the rectosigmoid portion of the large intestine. 1 Williams GT Bussey HJR Morson BC. Inflammatory “cap” polyps of the large intestine. Br J Surg. 1985; 72 ([abstract]): S133 Google Scholar It is characterized by the presence of inflammatory polyps consisting of elongated tortuous crypts covered by a “cap” of granulation tissue. 1 Williams GT Bussey HJR Morson BC. Inflammatory “cap” polyps of the large intestine. Br J Surg. 1985; 72 ([abstract]): S133 Google Scholar To our knowledge only a few cases have been reported, 2 Oshitani N Moriyama Y Matsumoto T Kobayashi K Kitano A. Protein-losing enteropathy from cap polyposis. Lancet. 1995; 346 ([letter]): 1567 Abstract PubMed Google Scholar , 3 Campbell AP Cobb CA Chapman RWG Kettlewell M Hoang P Hoat BJ et al. Cap polyposis—an unusual cause of diarrhea. Gut. 1993; 34: 562-564 Crossref PubMed Scopus (71) Google Scholar , 4 Gehenot M Colombel JF Wolschies E Quandalle P Gower P Lecomte-Houcke M et al. Cap polyposis occurring in the postoperative course of pelvic surgery. Gut. 1994; 35: 1670-1672 Crossref PubMed Scopus (40) Google Scholar and the clinical course remains uncertain. This is a case of cap polyposis in which colonoscopy revealed proximal extension of the disease. Furthermore, the condition was complicated by protein-losing enteropathy during the progression of the disease.