Fig. 3.

(A) Baseline chest computed tomography (CT) image shows multiple metastatic lung mass with tumor invasion to the left atrium from the pulmonary vein. (B) Follow-up CT image shows a partial response after two cycles of pembrolizumab and a slight decrease in the size of the multiple masses in both the lung and left atrium. (C) Follow-up CT image shows a partial response after four cycles of pembrolizumab and a marked decrease in the size of the multiple masses in both the lung and left atrium.