Toddler with a genetic disease Pediatric Imaging Musculoskeletal January 5, 2022January 2, 2022 AP radiograph of the knees (above) shows cupping of the metaphyses in the bilateral distal femurs and proximal tibias while AP radiograph of the wrists (below) shows cupping of the distal radius and ulna metaphyses bilaterally. The diagnosis was hereditary hypophosphatemic rickets. Related Published January 5, 2022January 2, 2022