Lung

Cystic disease / congenital anomalies

Sequestrations



Topic Completed: 1 August 2011

Minor changes: 17 July 2020

Copyright: 2003-2021, PathologyOutlines.com, Inc.

PubMed search: sequestrations [title] lungs

Elliot Weisenberg, M.D.
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Page views in 2021 to date: 2,226
Cite this page: Weisenberg E. Sequestrations. PathologyOutlines.com website. https://www.pathologyoutlines.com/topic/lungnontumorsequestrations.html. Accessed October 15th, 2021.
Definition / general
  • Lobes or segments of lung without a normal connection to the airway system (eMedicine)
  • Arterial blood supply is from aortic branches, NOT pulmonary arteries
  • Extrapulmonary sequestrations: external to lung, covered with separate pleural lining, may be anywhere in thorax or mediastinum; usually infants; abnormal masses, 90% on left side, 20% have other congenital anomalies; associated with polyhydramnios and edema; Venous drainage is into azygous system (Ultrasound Obstet Gynecol 2006;27:214)
  • Intralobar sequestrations: within the lung, usually lower lobe, segment is supplied by a large artery from aorta, not invested with its own pleura; associated with infections: bronchiectasis, chronic inflammation, and fibrosis; venous drainage is into pulmonary vein
Case reports
Gross images

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Microscopic (histologic) images

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