Normal thymus

Case contributed by Yusra Sheikh
Diagnosis certain

Presentation

Cough, increased work of breathing

Patient Data

Age: 3 months
x-ray

Bilateral minor perihilar opacities are seen. No pleural effusion. Cardiothymic silhouette is normal.

5 mth later

x-ray

There is linear subsegmental atelectasis in the left retrocardiac region. No pleural effusion. Cardiothymic silhouette remains normal (normal interval involution of thymus noted).

Case Discussion

The normal thymus is a great mimicker of lung pathology.  A normal thymus, no matter how big, does not displace the trachea or mediastinal structures. The case nicely demonstrates how a normal thymus involutes over time.

 

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