PDCD1 and neoplasm: In 130 (77%) of the patients, PD1 expression was detected on tumor cells (expression patterns: 0 [0%]: 22.6%; 1+ [5–25%]: 21%; 2+ [26–50%]: 18%; 3+ [51–75%]: 26%; and 4+ [76–100%]: 13%) (Table 2).