Horseshoe lung

Thomas Hartman

Research output: Chapter in Book/Report/Conference proceedingChapter


Imaging description Horseshoe lung is a rare congential malformation characterized by fusion of the posterior basilar segments of the right and left lower lobes through a partial parietal pleural defect. On imaging, this is seen as fusion of the right and left lower lobes posterior to the heart [1–3] (Figure 9.1). The majority of cases of horseshoe lung are associated with right lung hypoplasia and approximately 80% are associated with partial anomalous pulmonary venous return from the right lung to the inferior vena cava or right atrium (Scimitar syndrome) [1–3]. Importance Horseshoe lung itself is usually asymptomatic, however, there are a number of associated abnormalities that may be symptomatic. As stated previously, the most common associated abnormality is Scimitar syndrome. Absence of a pulmonary artery, pulmonary sling (Figure 9.1), accessory diaphragm, or pulmonary sequestration have also been reported [1–3]. Therefore, when horseshoe lung is identified, careful attention to the remainder of the chest is warranted in an attempt to identify any associated abnormalities.

Original languageEnglish (US)
Title of host publicationPearls and Pitfalls in Thoracic Imaging
Subtitle of host publicationVariants and Other Difficult Diagnoses
PublisherCambridge University Press
Number of pages2
ISBN (Electronic)9780511977701
ISBN (Print)9780521119078
StatePublished - Jan 1 2011

ASJC Scopus subject areas

  • General Medicine


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