Fig. 1.

Chest computed tomography scans. A–C Performed before the initiation of pembrolizumab. D–F Performed on day 196 (after 9 cycles of pembrolizumab) after the initiation of pembrolizumab. A A 2.2-cm tumor in the lower lobe of the left lung was seen (red circle). The primary lesion was observed. B Mediastinal lymph node metastasis was observed. C Left adrenal metastasis was observed. D, E The size of the primary lesion and mediastinal lymph node was reduced. F The left adrenal metastasis had disappeared.