Abstract:  iagnostic imaging studies from five different patients with the same condition are shown. These include chest posterioanterior (PA) (figure 1) and lateral (figure 2) radiographs, a PA chest radiograph (figure 3), an abdominal radiograph (figure 4), a lateral lumbar spine radiograph (figure 5), and a single CT image of the thorax (figure 6). What is the most likely diagnosis?