PDPN and neoplasm: A total of 64.96% of the tumour cells were associated with platelets in the mixture of WT platelets with PDPN + cells, which was significantly higher than in the WT platelets with PDPN- cells (12.00%, p < 0.001), CLEC-2 KO platelets with PDPN + cells (10.96%, p < 0.001) and CLEC-2 KO platelets with PDPN- cells (12.90%, p < 0.001) groups.