Teen with a palpable anterior left chest wall mass Pediatric Imaging Chest, Musculoskeletal May 16, 2020May 9, 2020 CXR shows a contour irregularity of the left second rib anteriorly. 3D CT shows a pseudoarthrosis between the left first and second ribs. The diagnosis was rib fusion / pseudoarthrosis of the left first and second ribs. Related Published May 16, 2020May 9, 2020