A mass obscures the ascending thoracic aorta and upper left heart border on the PA view, placing it in the anterior mediastinum. The lateral view confirms this. No calcifications are visible.
Original Source: Chris LeBrun and Joon Yun Submitted by: Paul J Cunningham - Affiliation: Madigan Army Medical Center
Approved By: James G. Smirniotopoulos, M.D. - Affiliation: Uniformed Services University
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