JMA Journal

Figure 1. Computed tomography (CT) image reveals a mass with a thick-walled cavity in the right upper lobe of the lung.

Figure 2. A. Hematoxylin and eosin (H&E) staining of the lung tumor tissue.
B. Immunohistochemical expression of programmed death ligand-1 (PD-L1). PD-L1 was observed in more than 90% of tumor cells in the lung biopsy tissue.

Figure 3. Images from positron emission tomography (PET)-CT scan of the patient.
A. Fluorodeoxyglucose uptake in the mediastinal lymph node, right adrenal gland, and right trapezius muscle.
B. A significant decrease in lung and metastatic tumor size as indicated by reduced fluorodeoxyglucose uptake, 21 weeks after treatment began.