MRI
Axial T1
Axial T2
Axial T1 fat sat
Coronal T1
Coronal T2
Coronal STIR
Sagittal T1 fat sat
There is a well-circumscribed spherical mass lesion in the left upper zone, originating from the left aspect of the middle mediastinum, abutting the aortic arch and left main vessels without evidence of invasion into the mediastinal structures. The lesion measures ~9.5 cm in diameter. It shows high signal on T1 and T2 suggesting protein content.