Fig. 2

Thoracic computed tomography scan comparison after the first and the fourth nivolumab infusion. Computed tomography scan, axial views through the middle and lower lung lobes before the first nivolumab injection (a and b) and after four courses of nivolumab and oral corticosteroid therapy (c and d). Both the primary tumor in the middle lobe and the metastasis in the lower lobe of the right lung shrank substantially (from 80 to 60 mm and from 23 to 16 mm, respectively). The amount of fluid in the two pleural cavities also decreased