PGK1 and neoplasm: PGK1 expression may serve as a prognostic marker of tumour progression considering the strong correlation of its high expression in many tumours, including breast cancer, colon cancer, glioma, lung cancer, and liver cancer, with tumour proliferation, metastasis, occurrence, development, and poor prognosis (Tang et al., 2008; Ahmad et al., 2013; Shashni et al., 2013; Ding et al., 2014).