PDCD1 and malignant colon neoplasm: The cut‐off value of PNR in advanced gastric carcinoma (34.7) was determined as death within 6 months after anti‐PD‐1 combination therapy, and PNR cut‐off values in advanced biliary tract carcinoma (40.5), colon cancer (56.1), and melanoma (51.8) were determined as tumor progression within 3 months, 6 months, and 4.5 years following immunotherapy, respectively (Figure S3).