Antitumor effect of anti-PD-L1 antibody. CT images of oral malignant melanoma (upper left) and its lung metastases (lower left) observed in a Pomeranian (12 years old, male). As a result of treatment with anti-PD-L1 antibody, all detectable tumors disappeared (right panels; Naoya Maekawa, et al. npj Precision Oncology. February 12, 2021).