Appearance of mediastinal granuloma on chest CT

Mediastinal granuloma can have a variety of appearances on chest computed tomography (CT). (A) Subcarinal mediastinal granuloma (arrow) showing classical mass-like lesion with heterogeneous appearance and scattered calcifications including rim-lining calcifications (arrowheads). (B) Right paratracheal mediastinal granuloma (arrow) with speckled calcifications with some central and some peripheral calcifications. (C) Subcarinal mediastinal granuloma with diffuse calcification (arrow).