Toddler with a left abdominal mass Pediatric Imaging Genitourinary November 5, 2021October 15, 2021 The diagnosis was Wilms tumor of the left kidney and nephrogenic rests from nephroblastomatosis in the right kidney. The diagnosis was Wilms tumor of the left kidney and nephrogenic rests from nephroblastomatosis in the right kidney. Related Published November 5, 2021October 15, 2021