Prominent Thymus

Etiology: normal variant, increased size and weight of thymus with preservation of normal microscopic features
CXR: enlarged lobes of thymus
US: thymus has characteristic starry sky appearance

Radiology Cases of Prominent Thymus

CXR of a prominent thymus — CXR AP+lateral shows an anterior mediastinal mass without a thymic wave or thymic sail sign that was confirmed on US to be normal thymic tissue.

CT of a prominent thymus gland — Axial CT without contrast of the chest shows a prominent thymus gland.