CT thorax with contrast showing osteochondroma (at yellow arrowhead) arising from the right first rib and possibly the transverse process of T11.8 x 1.8 x 1.6 cm calcified/ossified mass, appearing to arise from the right first rib, suggestive of osteochondroma. The almost complete calcification of this lesion makes the diagnosis of neuroblastoma less likely.CT - Computerized Tomography