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DOI: 10.1055/s-0033-1359118
Colonic xanthoma: a rare non-neoplastic polypoid lesion
Publication History
Publication Date:
12 February 2014 (online)
A 78-year-old man with a history of hyperlipidemia underwent colonoscopy because of a positive fecal occult blood screening test without any symptoms. In the sigmoid colon, a whitish-yellow, sessile, polypoid lesion was found, which measured about 15 mm in diameter ([Fig. 1]). Magnifying endoscopy with narrow band imaging revealed a regular arrangement of round pits and previously invisible microvessels on the surface of the mucosa ([Fig. 2]).
Endoscopic biopsy specimens revealed an intact superficial colonic mucosa and a lamina propria that was replaced by aggregates of foamy histiocytes. These had small, centrally located nuclei and abundant cytoplasm that was filled with fine vacuoles ([Fig. 3]). Based on these findings, a diagnosis of colonic xanthoma was made, but no additional treatment was administered. We could find no esophageal or gastric xanthoma on esophagogastroduodenoscopy. Repeat colonoscopy performed 1 year later showed no change in appearance of the colonic xanthoma.
Gastrointestinal xanthomas are frequently found in the stomach, and rarely, in the esophagus, small bowel, colon, and rectum. Nakasono et al. showed that colonic xanthomas were usually located in the sigmoid colon or rectum and, in contrast to gastric and esophageal xanthomas, consisted of predominantly sessile polypoid lesions [1]. Most were reddish or whitish in color, and the median size was approximately 5 mm (range 2 – 14 mm). Although xanthomas found in the stomach are usually associated with Helicobacter pylori infection, colonic xanthomas have no clinical significance and their etiology remains unclear [2].
Colonic xanthomas have rarely been described and endoscopic images of them, to our knowledge, have previously been shown in only one case [3]. Our case highlights the characteristic endoscopic appearance of a colonic xanthoma, which is usually regarded as a rare non-neoplastic polypoid lesion.
Endoscopy_UCTN_Code_CCL_1AD_2AC
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References
- 1 Nakasono M, Hirokawa M, Muguruma N et al. Colorectal xanthomas with polypoid lesion: report of 25 cases. APMIS 2004; 112: 3-10
- 2 Moran AM, Fogt F. 70-year-old female presenting with rectosigmoid (colonic) xanthoma and multiple benign polyps – case report. Pol J Pathol 2010; 1: 42-45
- 3 Weinstock LB, Shartz BA, Saltman RJ et al. Xanthoma of the colon. Gastrointest Endosc 2002; 55: 410