Thymic sail sign

The thymic sail sign represents a triangular-shaped inferior margin of the normal thymus seen on neonatal frontal chest radiograph. It is more commonly seen on the right side, and can also be bilateral. It is seen in 3-15% of all cases. This sign should not be confused with the spinnaker sail sign which indicates a pneumomediastinum.

Share article

Article Information

rID: 41331
Systems: Chest, Paediatrics
Section: Signs
Tag: thymus
Synonyms or Alternate Spellings:
  • Sail sign of thymus

Support Radiopaedia and see fewer ads

Cases and Figures

  • Drag
    Blue Sail

Image ...
    Figure 1: photograph of sail
    Drag here to reorder.
  • Drag
    Case 1
    Drag here to reorder.
  • Updating… Please wait.
    Loadinganimation

    Alert accept

    Error Unable to process the form. Check for errors and try again.

    Alert accept Thank you for updating your details.