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Stag's antler sign (lungs)

Last revised by Dr Mohamed Saber on 06 Jan 2021

The stag's antler sign, also known as the hands-up or inverted moustache sign, refers to upper lobe pulmonary venous diversion in pulmonary venous hypertension or pulmonary edema as seen on an erect frontal chest radiograph.

The prominence of upper lobe pulmonary veins resembles a stag's antlers. It is the earliest sign of pulmonary venous hypertension (grade 1 pulmonary edema). 

Rarely a unilateral form has been described 5.

This is not to be confused with the antler sign described for lung torsion.

Epidemiology

Association 

The commonest causes of stag antler sign on chest x-ray are 4:

See also

 

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Cases and figures

  • Figure 1: antlers (photo)
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  • Case 1
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  • Case 2
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