Thymic wave sign

Last revised by Mostafa Elfeky on 19 Oct 2021

Thymic wave sign refers to the indentation of the normal thymus in young children by the ribs, resulting in a wavy border on chest radiograph. 

There are at least 3 described signs relating to a normal thymus in infants; thymic sail signthymic notch sign and thymic wave sign. Being able to identify the signs helps in preventing overcalling the cardiothymic silhouette. 

See also

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Cases and figures

  • Case 1
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  • Case 2
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  • Case 3
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  • Case 4: with bronchiolitis
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  • Case 5
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