CCNB2 and squamous cell carcinoma: The study found that CCNB2 was negatively correlated with the poor prognosis of lung cancer and was an independent predictor of poor prognosis in patients with lung adenocarcinoma; there was no significant difference in 5-year overall survival between patients with squamous cell carcinoma expressing lower and higher levels of CCNB2 mRNA [28, 29].