Naclerio V sign

Dr Henry Knipe et al.

The Naclerio V sign is a sign described on the plain film in patients with a pneumomediastinum occurring often secondary to an oesophageal rupture

It is seen as a V-shaped air collection. One limb of the V is produced by mediastinal air outlining the left lower lateral mediastinal border. The other limb is produced by air between the parietal pleura and medial left hemidiaphragm. 

Although Naclerio V sign was originally described in patients with oesophageal
rupture, it is not entirely specific to that condition.  

History and etymology

It is named after Emil A. Naclerio, an American radiologist, who first described it in 1957 1.

Chest x-ray
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Article information

rID: 19643
System: Chest
Section: Signs
Tags: cases, sign
Synonyms or Alternate Spellings:
  • Naclerio's v sign
  • Naclerios v sign

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