Liver and intrahepatic bile ducts-nontumor

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Liver and intrahepatic bile ducts-nontumor

Developmental anomalies/cysts

Foregut cyst

Reviewers: Komal Arora, M.D. (see Reviewers page)
Revised: 23 April 2012, last major update April 2012
Copyright: (c) 2004-2012, PathologyOutlines.com, Inc.

General
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● Rare, < 100 cases reported
● Intrahepatic ileal and duodenal duplications and ciliated foregut cysts have been described
● 4 cm or smaller, have smooth muscle bundles in cyst wall
● Slightly more common in men, and in medial segment of left hepatic lobe
● Resemble bronchiolar epithelium

Case reports
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● Ciliated foregut cyst with squamous cell carcinoma (Arch Pathol Lab Med 1999;123:1115)

Gross description
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● Solitary, rarely multilocular, 1-4 cm

Micro description
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● Ciliated pseudostratified columnar epithelium with goblet cells, subepithelial connective tissue, 1-3 smooth muscle layers, outer fibrous capsule

Micro images
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Ciliated foregut cyst

Ciliated foregut cyst with squamous metaplasia, dysplasia and carcinoma

Additional references
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● Am J Surg Pathol 1999;23:671, Hum Pathol 2000;31:241

End of Liver and intrahepatic bile ducts-nontumor > Developmental anomalies/cysts > Foregut cyst

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