RADIOLOGY: CHEST: Case# 7: MVA, H/O THYROID CA, ANT. MED. GOITER. 55 year old female who is S/P MVA. 1) Large heterogeneous well circumscribed anterior mediastinal mass with areas of calcification. Thymoma is considered to be the most likely etiology given the patients age. Teratoma is considered in the differential as well. 2) Solitary enlarged lymph node in the right upper mediastinum.