Korean J Gastroenterol.  2009 Jul;54(1):42-45. 10.4166/kjg.2009.54.1.42.

A Case of Ileal Duplication Cyst Lined by Ciliated Columnar and Squamous Epithelium

• Kim KH
• Choi SC
• Kang DB
• Yun KJ

• KMID: 1792765
• DOI: http://doi.org/10.4166/kjg.2009.54.1.42

Abstract

Duplication is a rare congenital abnormality and may occur in any region of the gastrointestinal tract. A 19-year-old woman was admitted due to lower abdominal pain. Abdomino-pelvic CT scan showed a cystic mass interpreted as mesenteric cyst or duplication cyst. On the operation finding, it seemed to be arised from mesentery but attached to the ileum. Microscopically, the cystic wall was lined by non-keratinizing squamous, ciliated pseudostratified columnar epithelium, and ectopic gastric mucosa with two distinct muscular layers and a serosa. We report the first case of ileal duplication cyst lined by squamous and ciliated columnar epithelium in Korea.

Keyword

Duplication; Cyst; Ileum; Ciliated epithelium; Squamous epithelium

MeSH Terms

Cilia/pathology
Cysts/*congenital/pathology/radiography
Epithelium/pathology
Female
Humans
Ileal Diseases/*diagnosis/pathology/radiography
Ileum/*abnormalities/pathology
Tomography, X-Ray Computed
Young Adult

Figure

• 

  Fig. 1. Abdominopelvic CT scan showed a 8×6 cm sized, non-enhancing, thin walled, fluid-filled, cystic lesion (white arrow) on the right lower abdomen.

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  Fig. 2. Abdominal sonography showed the hypoechoic, thin walled, uniloculated cyst with inner hyperechoic mucosal and outer hypoechoic muscular layers (white arrow), consistent with a duplication.

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  Fig. 3. Operation finding. A huge round mass was broadly based on the mesenteric side of the ileum.

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  Fig. 4. Gross finding of the cross sectioned specimen showed that the cyst was uniloculated, dark serous fluid-filled and attached to the ileum without solid portion or irregular wall thickening.

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  Fig. 5. Microscopic findings. (A) Two distinct muscular layers with myenteric plexus and a serosal layer attached to the small bowel wall were noted (H&E, ×100). (B) The cyst was lined by ciliated pseudostratified columnar cell (white arrow), stratified squamous cells (black arrow), and columnar cells (H&E, ×200).

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