Infant with abnormal lower extremity posturing Pediatric Imaging Musculoskeletal January 23, 2022December 9, 2021 AP radiograph of the pelvis shows an osteosclerotic appearance to the bones with obliteration of the marrow spaces and a developing bone within bone appearance especially in the femurs. The diagnosis was osteopetrosis. Related Published January 23, 2022December 9, 2021