STK11 and obesity due to melanocortin 4 receptor deficiency: More strikingly, LKB1 is recognized as a tumour suppressor gene, and inactivation of LKB1 predisposes people to various cancer.35 Meanwhile, a line of evidence suggests HFD‐induced obesity augments the risk of cancer as well as cardiovascular disease.36 Therefore, we speculate CTRP9 may have anticancer properties.