Thymic notch sign

The thymic notch sign represents the normal thymus in a newborn on a frontal chest radiograph. Interruption of the cardiac silhouette forms a notch, which may be seen on either side, but more frequently is seen on the left side. 

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Article information

rID: 41330
Section: Signs
Tag: thymus
Synonyms or Alternate Spellings:
  • Notch sign of thymus

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