Cap polyposis of the colon and rectum: An analysis of endoscopic findings
ABSTRACT Because of the rarity of cap polyposis of the colon and rectum, the endoscopic features of this condition have not been specified to date. The aim of this study is to characterize the endoscopic features of cap polyposis.
The diagnosis of cap polyposis was established by histologic findings in specimens obtained endoscopically or surgically from four patients. Colonoscopic findings in the four patients were retrospectively reviewed.
The endoscopic features were divided into semipedunculated type (three patients) and flat-topped protruding type (one patient). In the semipedunculated type, the polyps were characterized by reddish protrusions of various configurations with eroded surface in the rectosigmoid colon. In the remaining patient, all the lesions were flat protrusions with a reddish central depression. The polyps of both types became smaller in size and fewer in number at the proximal part of the sigmoid colon. Multiple white specks were observed in the intervening mucosa in all four patients.
The prominence of the polyps at the distal part of the colon and rectum and multiple white specks in the intervening mucosa seem to be the additional endoscopic features suggestive of cap polyposis.
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ABSTRACT: The pathogenesis of cap polyposis remains unknown. Here, we report a patient with cap polyposis that developed simultaneously in the colon and stomach, and which regressed after Helicobacter pylori eradication. A 63-year-old man was diagnosed as having cap polyposis with mucoid stool, diarrhea, and bleeding on defecation. Following 5 weeks of total parenteral nutrition, his symptoms and hypoproteinemia improved and he was discharged, although follow-up colonoscopic findings revealed no improvement. Subsequent gastroscopy revealed diffusely erosive polyps with cap-like "fur" from the angle to the antrum of the stomach, similar to the lesions observed in the colon. Because H. pylori infection was demonstrated in the stomach, eradication therapy was administered. After this treatment, his symptoms immediately disappeared, and the polypoid lesions in the colon and stomach had completely disappeared 8 months later. Because there have been no previous reports of a relationship between H. pylori and cap polyposis, this case is of great interest.Journal of Gastroenterology 02/2002; 37(6):463-6. DOI:10.1007/s005350200067 · 4.02 Impact Factor
- Digestive Diseases and Sciences 08/2002; 47(7):1465-8. DOI:10.1023/A:1015890329492 · 2.55 Impact Factor
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