Hilum convergence sign

The hilum convergence sign is a useful chest radiograph sign to help distinguish a bulky hilum due to pulmonary artery dilatation from a juxtahilar mass/nodal enlargement. 

If pulmonary artery branches are visible through the opacity and converge towards the waist of the heart (positive hilum convergence sign), then the opacity is due to a juxtahilar mediastinal mass. 

If, however, the pulmonary artery branches lead towards the abnormal ‘bump’, then the opacity is due to an enlarged pulmonary artery (negative hilum convergence sign) 1.

History and etymology

Benjamin Felson (1913-1988) was an American radiologist who first described this sign 2

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Article information

rID: 18809
System: Chest
Section: Signs
Tag: cases
Synonyms or Alternate Spellings:

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Cases and figures

  • Case 1
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  • Case 2: hilum convergence sign
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