Thymic sail sign

Case contributed by Dr Yusra Sheikh


? aspiration post vomiting episode

Patient Data

Age: 8 months
Gender: Male

Tracheostomy in place. There is no confluent consolidation or atelectasis. No pleural effusion.

Cardiothymic silhouette is normal (sail sign of the thymus is noted).

Case Discussion

The thymus is a great mimicker for lung pathology. There are several radiographic features which help identify a normal thymus:

  1. Thymic sail sign
  2. Subtle notches on either side of the cardiothymic contour.
  3. Wavy or scalloped peripheral contour

The normal thymus, however large it is, should not displace the trachea or compress the adjacent structures.

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Case information

rID: 68940
Published: 20th Jun 2019
Last edited: 20th Jun 2019
Inclusion in quiz mode: Included

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