MKI67 and squamous cell carcinoma: Interestingly, meta‐analysis of four squamous carcinomas originating from the oesophagus, head and neck, lung and cervix in the TCGA dataset showed low Ki67 mRNA expression, indicating worse OS (HR = 0.83, p = 0.0381), while in the additional 14 types of solid tumours, the prognostic value of Ki67 was converse to that in squamous carcinoma (HR = 1.46, p = 0.0013).