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Lung-nontumor

Cystic disease/congenital anomalies

Mesenchymal cystic hamartoma


Reviewers: Elliot Weisenberg, M.D. (see Reviewers page)
Revised: 25 August 2011, last major update August 2011
Copyright: (c) 2003-2011, PathologyOutlines.com, Inc.

Definition
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● 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

Gross images
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Tumor of chest wall

End of Lung-nontumor > Cystic disease/congenital anomalies > Mesenchymal cystic hamartoma


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