Renal pediatric tumors: imaging approach according to the most important international working groups requirements - Teixeira, Sara; Muglia, Valdair Francisco; Oliveira, Tatiane; Ito, Natalia; Santos, Marcel Koenigkam; Tucci Júnior, Silvio; Elias Júnior, Jorge (Scientific Assembly and Annual Meeting of Radiological Society of North America (RSNA), 2013)