YAP1 and pancreatic adenocarcinoma: Further immunohistochemistry validation using the same set of PAAD tissue samples revealed that the expression level of VCPIP1 was greater in PAAD than in normal pancreatic tissue (Fig. 1J, K) and that the expression of VCPIP1 was positively correlated with YAP expression (P = 0.003; Fig. 1M, N).