Lung - nontumor
Other nonneoplastic disease
Atelectasis

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

Revised: 9 March 2017, last major update October 2011

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

PubMed search: pulmonary atelectasis [title]

Table of Contents
Definition / general
Cite this page: Atelectasis. PathologyOutlines.com website. http://www.pathologyoutlines.com/topic/lungnontumoratalectasis.html. Accessed October 22nd, 2017.
Definition / general
  • Incomplete expansion of lung or collapse of previously inflated lung, due to obstruction / resorption, compression or contraction
  • Obstruction: resorption of oxygen causes collapse and mediastinal shifts towards affected lung; due to mucus plugs, asthma, chronic bronchitis, bronchiectasis, postoperative changes, foreign bodies, but not usually due to tumors, which cause only subtotal obstruction
  • Compression: due to fluid (congestive heart failure), air (pneumothorax), tumor and blood; causes mediastinal shifts away from affected lung
  • Contraction: due to fibrosis (restrictive lung disease)
  • Patchy: due to loss of surfactant in acute respiratory distress syndrome