cases, retroperitoneum Week 103: Case 6 April 26, 2023 pathadmin 1. Presented by Jonathan Epstein, M.D. and prepared by Ali Ansari-Lari, M.D.,Ph.D.68-year-old female with a large retroperitoneal mass which appears distinct from the kidney. The mass measures approximately 7 " x 6 x 11 cm and is adjacent to but not felt to involve the kidney./images/7-1-02-6a.JPG/images/7-1-02-6b.JPG/images/7-1-02-6c.JPG/images/7-1-02-6d.JPGWell-differentiated lipoma-like liposarcomaAngiomyolipomaLipoma Loading...