...the patient was thereafter received pembrolizumab intravenously at 100 mg every 3 weeks with a negative programmed death-ligand 1 (PD-L1) test result….she underwent 2 cycles of pembrolizumab, however, she discontinued treatment due to an interstitial pneumonia. What surprised us is that the CT scan after 2 cycles revealed a significant decrease in the tumor or even its disappearance, attained a complete remission in the clinic (Figure 3). The patient has continued to be supervised with CT scans and serum tumor marker measurements every 3 or 4 months and is still in complete remission at this time.