Endoscopy 2014; 46(S 01): E53
DOI: 10.1055/s-0033-1359118
Cases and Techniques Library (CTL)
© Georg Thieme Verlag KG Stuttgart · New York

Colonic xanthoma: a rare non-neoplastic polypoid lesion

Masaki Katsurahara
1   Department of Endoscopic Medicine, Mie University Graduate School of Medicine, Mie, Japan
,
Noriyuki Horiki
1   Department of Endoscopic Medicine, Mie University Graduate School of Medicine, Mie, Japan
,
Shunsuke Tano
1   Department of Endoscopic Medicine, Mie University Graduate School of Medicine, Mie, Japan
,
Yasuhiko Hamada
1   Department of Endoscopic Medicine, Mie University Graduate School of Medicine, Mie, Japan
,
Kyosuke Tanaka
1   Department of Endoscopic Medicine, Mie University Graduate School of Medicine, Mie, Japan
,
Hiroyuki Inoue
2   Department of Gastroenterology and Hepatology, Mie University Graduate School of Medicine, Mie, Japan
,
Yoshiyuki Takei
2   Department of Gastroenterology and Hepatology, Mie University Graduate School of Medicine, Mie, Japan
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Corresponding author

Masaki Katsurahara, MD, PhD
Department of Endoscopic Medicine
Mie University Graduate School of Medicine
2-174 Edobashi
Tsu, Mie
Japan   
Fax: +81-59-2315223   

Publikationsverlauf

Publikationsdatum:
12. Februar 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]).

Zoom Image
Fig. 1 Endoscopic image in a 78-year-old man, with a history of hyperlipidemia and a positive fecal occult blood test, showing a whitish-yellow polyp in the sigmoid colon.
Zoom Image
Fig. 2 Magnifying endoscopy with narrow band imaging showing a regular arrangement of small round pits on the surface of the polyp and a vascular pattern of the previously invisible microvessels.

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.

Zoom Image
Fig. 3 Histological appearance of the biopsy specimen showing aggregates of foamy histiocytes present in the lamina propria consistent with a xanthoma (hematoxylin and eosin [H&E] stain, magnification × 200).

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


#

Competing interests: None

  • 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

Corresponding author

Masaki Katsurahara, MD, PhD
Department of Endoscopic Medicine
Mie University Graduate School of Medicine
2-174 Edobashi
Tsu, Mie
Japan   
Fax: +81-59-2315223   

  • 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

Zoom Image
Fig. 1 Endoscopic image in a 78-year-old man, with a history of hyperlipidemia and a positive fecal occult blood test, showing a whitish-yellow polyp in the sigmoid colon.
Zoom Image
Fig. 2 Magnifying endoscopy with narrow band imaging showing a regular arrangement of small round pits on the surface of the polyp and a vascular pattern of the previously invisible microvessels.
Zoom Image
Fig. 3 Histological appearance of the biopsy specimen showing aggregates of foamy histiocytes present in the lamina propria consistent with a xanthoma (hematoxylin and eosin [H&E] stain, magnification × 200).