DCLK1 and cancer: Previous studies showed that DCLK1 was overexpressed in many tumours, including colorectal,9, 10, 11, 12, 13, 14, 15 pancreatic,16, 17 gastric,18 renal,19 hepatocellular carcinoma20 and other cancers.21, 22, 23, 24, 25, 26