Fig. 1.

Summary of treatment and monitoring tumor response. A Various interventions that the patient received. Arrowheads indicate time points for each intervention. B (a–e) PET/CT or chest CT images for lung lesions before and after nivolumab. Radiologic response to nivolumab was first noted at the onset of pneumonitis as multiple ground-glass opacities surrounded by consolidations of air bronchograms in bilateral lungs on restaging PET/CT obtained at 6.5 weeks after nivolumab treatment. Subsequent CT scans showed resolution of pneumonitis and complete remission of tumor at 13 weeks