Lung - nontumor
Cystic disease / congenital anomalies
Mesenchymal cystic hamartoma



Topic Completed: 1 August 2011

Revised: 28 January 2019, last major update August 2011

Copyright: (c) 2003-2017, PathologyOutlines.com, Inc.

PubMed search: mesenchymal cystic hamartoma lung


Elliot Weisenberg, M.D.
Page views in 2018: 775
Page views in 2019 to date: 480
Table of Contents
Definition / general
Cite this page: Weisenberg E. Mesenchymal cystic hamartoma. PathologyOutlines.com website. http://www.pathologyoutlines.com/topic/lungnontumormesenchymalcystic.html. Accessed July 18th, 2019.
Definition / general
  • Bilateral multifocal cysts lined by normal or metaplastic respiratory epithelium resting on a cambium layer of mesenchymal cells
  • Rare
  • Lesion is initially solid, but becomes cystic when approximately 1 cm in diameter
  • Slow growing
  • Associated with pneumothorax (Can Respir J 2003;10:280)
  • Generally follows an indolent course
  • In females, metastatic low grade endometrial stromal sarcoma must be excluded
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