cases, kidney Week 319: Case 6 April 26, 2023 pathadmin 1. Presented by George Netto, M.D. and prepared by Amy Duffield, M.D., Ph.D.4 year old boy presented with an enlarging abdominal mass. A 14 cm right renal mass was found on imaging studies. A radical nephrectomy was performed. On immunohistochemical analysis, the tumor was negative for WT1 and focally positive for NSE.images/6A_7_30_07.jpgimages/6B_7_30_07.jpgimages/6C_7_30_07.jpgimages/6D_7_30_07.jpgimages/6E_7_30_07.jpgPrimary ewing sarcoma/PNET of kidneyWilms tumor (Nephroblastoma)NeuroblastomaDesmoplastic small round cell tumor Loading...