[Atypic radiologic aspect of a renal cell carcinoma in children]

Renal cell carcinoma is rare in children and is usually found in late childhood. The authors report on an exceptional case of renal cell carcinoma in a 10-year-old girl. The radiological aspect is misleading and has not been previously reported in the literature. Renal cortex was thin because of congenital megalo-ureter, so the tumor developed entirely into excretory cavities (to the proximal ureter), while a primitive urothelial disease (tumoral or inflammatory) was first evoked. The atrophied cortex was the tumoral starting point which prolapsed into excretory cavities, upraising the urothelial epithelium.