Lung - nontumor
Cystic disease / congenital anomalies
Mesenchymal cystic hamartoma

Author: Elliot Weisenberg, M.D. (see Authors page)

Revised: 22 February 2017, last major update August 2011

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

PubMed search: mesenchymal cystic hamartoma lung

Table of Contents
Definition / general
Cite this page: Mesenchymal cystic hamartoma. PathologyOutlines.com website. http://www.pathologyoutlines.com/topic/lungnontumormesenchymalcystic.html. Accessed November 24th, 2017.
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