Fleischner sign (enlarged pulmonary artery)

Dr Ian Bickle et al.

Fleischner sign is a prominent central artery that can be caused either by pulmonary hypertension that develops or by distension of the vessel by a large pulmonary embolus. It can be seen on chest radiographs and CT pulmonary angiography.

It is seen most commonly in the setting of massive pulmonary embolism (defined angiographically as involving 50% or more of the major pulmonary artery branches). It has a low sensitivity but high specificity. 

History and etymology

It is named after Felix G. Fleischner, a German-American radiologist, who first described it in 1961.

See also

Chest x-ray
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Article information

rID: 21817
System: Chest
Section: Signs
Tags: stub, cases
Synonyms or Alternate Spellings:
  • Fleischner sign: chest x ray

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