Xanthomatous hyperplastic polyps of the stomach: clinicopathologic study of 5 patients with polypoid gastric lesions showing combined features of gastric xanthelasma and hyperplastic polyp.

Gastric xanthelasmas are uncommon benign lesions that are macroscopically well-demarcated yellow or yellow-white plaques and are microscopically formed by collections of foamy macrophages. Because gastric hyperplastic polyps may rarely be associated with xanthelasma, we aimed to report 5 cases of combined lesions showing features of gastric xanthelasma and hyperplastic polyps observed over the past 3 years at our institution among 4497 patients who underwent gastric endoscopy. The patients were 3 men and 2 women aged 45 to 78 years.

Prevalence of microscopic colitis in patients with diarrhea of unknown etiology in Turkey.

Aim: To investigate the prevalence and demography of microscopic colitis in patients with diarrhea of unknown etiology and normal colonoscopy in Turkey.

Methods: Between March, 1998 to July, 2005, 129 patients with chronic non-bloody diarrhea of unexplained etiology who had undergone full colonoscopy with no obvious abnormalities were included in the study. Two biopsies were obtained from all colonic segments and terminal ileum for diagnosis of microscopic colitis.