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.