Naclerio V sign

Dr Dan J Bell and 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 gas outlining the left lower lateral mediastinal border. The other limb is produced by gas 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 (1915-1985), an American thoracic surgeon, who first described it in 1957 1,4.

Chest x-ray
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Article information

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

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