cases, testis Week 358: Case 4 April 26, 2023 pathadmin 1. Presented by Jonathan Epstein, M.D. and prepared by Joseph J. Maleszewski, M.D.A 27-year-old male with a testicular mass is worked up and found to have Kleinfelter"s syndrome verified by cytogenetics. An orchiectomy was performed.images/jjm071408/small3909a.jpgimages/jjm071408/small3909b.jpgimages/jjm071408/small3909c.jpgimages/jjm071408/small3909d.jpgimages/jjm071408/small3909e.jpgMarked Leydig cell hyperplasiaMalignant germ cell tumor, Embryonal carcinomaLeydig cell tumorMetastatic renal cell tumor Loading...