HDAC6 and pancreatic adenocarcinoma: It was further observed that HDAC6 was only expressed in 33 tumors in PAAD (HR = 0.960, 95CI%: 0.990–1.000, P = 0.032), THYM (HR = 0.870, 95CI%: 0.800–0.960, P = 0.005), and UVM (HR = 0.930, 95CI%: 0.870–0.990, P = 0.018) with of prognostic significance (Figure 2).