Lung - nontumor
Cystic disease / congenital anomalies
Sequestrations (intralobar and extrapulmonary lobar)

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

Revised: 22 February 2017, last major update August 2011

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PubMed search: sequestrations [title] lungs

Cite this page: Sequestrations (intralobar and extrapulmonary lobar). PathologyOutlines.com website. http://pathologyoutlines.com/topic/lungnontumorsequestrations.html. Accessed February 28th, 2017.
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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Micro Images

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