Wilms' Tumor in Adults: Results of the Society of Pediatric Oncology (SIOP) 93-01/Society for Pediatric Oncology and Hematology (GPOH) Study

Purpose In the Society of Pediatric Oncology (SIOP) 93-01 study, 30 patients older than 16 years were found to have Wilms' tumor. They were treated according to the pediatric protocol and were analyzed for clinical presentation, stage distribution, and prognosis. Patients and Methods Patient age ranged from 16 to 62 years (median, 25.4 years). Tumor stages were defined according to SIOP, and treatment was risk-adapted according to SIOP 93-01/Society for Pediatric Oncology and Hematology (GPOH) protocol. The patients were evaluated with regard to response, toxicity, and prognosis. Specimens of all tumors were centrally reviewed. Results Ten patients (33%) had metastatic disease at the time of diagnosis (liver, four patients; lung, three patients; liver and lung, three patients). The local stage distribution showed a predominance of higher stages (stage I, eight patients; stage IIN−, three patients; stage IIN+, four patients; stage III, 15 patients). Histologic studies revealed intermediate-risk in 23 of 30...