MDK and hepatocellular carcinoma: Specifically, apart from HCC, MDK expression is found to be elevated in lung cancer [27,28], glioblastoma [29], childhood lymphoblastic leukemia [30], gastric cardia adenocarcinoma [31], prostate cancer [32], head and neck squamous cell carcinoma [33], pancreatic cancer [34], endometrial cancer [35], and bladder cancer [36], and, in most cases, it is also associated with a more metastatic phenotype and a poor prognosis.