Lung - nontumor
Other nonneoplastic disease
Round or rounded atelectasis



Topic Completed: 1 December 2011

Revised: 30 January 2019, last major update December 2011

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

PubMed search: round atelectasis [title] OR rounded atelectasis [title]


Elliot Weisenberg, M.D.
Page views in 2018: 551
Page views in 2019 to date: 314
Cite this page: Weisenberg E. Round or rounded atelectasis. PathologyOutlines.com website. http://www.pathologyoutlines.com/topic/lungnontumorroundedat.html. Accessed July 18th, 2019.
Definition / general
  • Localized area of subpleural lung collapse with associated pleural fibrosis
  • Patients usually asymptomatic with occupational exposure to asbestos
  • Usually posterior portion of a lower lobe
Gross description
  • Lung shows ill defined atelectasis with deeply invaginated pleural folds, which may disappear during grossing
Microscopic (histologic) description
  • Pleural fibrosis and invagination (use elastic stains to highlight) and atelectasis
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