cases, mediastinum Week 395: Case 3 April 26, 2023 pathadmin 1. Presented by Peter Illei, M.D. and prepared by Andrea Subhawong, M.D.54 year old male with a history of "malignant thymoma" and a new 7.5 cm anterior mediastinal mass that is adherent to the pleura and pericardium. A CD5 immunostain is shown below. CD117 was also positive.images/6.1.09.03a.jpgimages/6.1.09.03b.jpgimages/6.1.09.03c.jpgimages/6.1.09.03d.jpgThymoma, WHO type B3Thymoma, WHO type AThymic carcinoma with treatment effect Loading...