There is a well defined solid moderately enhancing lesion with a few non-enhancing necrotic areas within, is seen in the anterior mediastinum. No calcification cystic or fat component is seen within.
The lesion is anteriorly abutting the right mid costal cartilages and the sternum. However no obvious bony erosion or chest wall involvement is noted.
Postero-medially it is abutting the right atrium and the ascending aorta with maintained intervening fat planes, no infiltration to the adjacent structures is seen.
Imaging findings are suggestive of thymoma.
Biopsy was taken few days later and lesion turned out to be thymic epithelial hyperplasia.