Lung fissures

Dr Mark Thurston and Dr Henry Knipe et al.

Lung fissures are a double-fold of visceral pleura that either completely or incompletely invaginate lung parenchyma to form the lung lobes. 

Each lung has an oblique fissure separating the upper lobes from the lower lobes and the right lung has a horizontal fissure that separates the right upper lobe from the middle lobe

There are numerous accessory fissures that are common anatomical variants. 

Anatomy: Thoracic
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Article information

rID: 22241
System: Chest
Section: Anatomy
Synonyms or Alternate Spellings:
  • Pleural fissure
  • Pleural fissures
  • Pulmonary fissures
  • Pulmonary fissure
  • Lung fissure
  • Fissures of the lung
  • Fissures of the lungs

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Cases and figures

  • Figure 1
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  • Case 1: normal appearance on chest CT
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