PDCD1LG2 and cancer: Disease recurrence was 25% in cases with high cancer cell PD-L2 levels (56 of 225) and 24% in cases with high stromal cell PD-L2 levels (60 of 253) compared with 14% in cases with low PD-L2 levels (64 of 459 in cancer cells or 60 of 431 in stromal cells).