The neoplastic cells demonstrated focal membranous labeling for ALK protein by immunohistochemistry, ALK gene rearrangement by fluorescence in situ hybridization, and a specific VCL-ALK gene fusion by reverse transcriptase polymerase chain reaction.     ///    VCL-ALK renal cell carcinoma in children with sickle-cell trait: the eighth sickle-cell nephropathy?.     ///    VCL-ALK renal cell carcinoma may represent the eighth sickle-cell nephropathy. 