Twenty children with non-Wilms renal tumors from a reference center in Central Anatolia, Turkey

Abstract

Background/aim: Non-Wilms renal tumors NWRTs are rarely encountered in children. The aim of this study is to determine the treatment strategies, prognosis, outcomes, and survival of children with NWRTs at Erciyes University in Kayseri, Turkey.Materials and methods: Medical records of all patients n = 20 treated for NWRTs over a 23-year period 1995-2018 were reviewed retrospectively.Results: There was male predominance female/male: 7/13 ; the median age at diagnosis was 3.2 years old 0.1-13.5 years old . The major histological groups included mesoblastic nephroma MBN , n: 5, 25% , malignant rhabdoid tumor MRT , n: 5, 25% , renal cell carcinoma, n: 3, 15% , inflammatory myofibroblastic tumor n: 2, 10% , multilocular cystic renal tumors n: 2, 10% , metanephric adenoma n: 1, 5% , renal neuroblastoma n: 1, 5% , and bilateral renal Ewing sarcoma/primitive neuroectodermal tumor ES/PNET n: 1, 5% . All of the patients with NWRTs had radical nephrectomy except the child with bilateral renal ES/PNET. Six children died because of progressive disease; the mortality rate was 30% n: 6 . Conclusion: We have made the first report of bilateral renal involvement of ES/PNET in the English medical literature. Physicians dealing with pediatric renal masses should be alert to the high mortality rate in children with MRT, MBN, and ES/PNET and they should design substantial management plans for NWRTs.