CDK12 and neoplasm: When the analysis was done on patients stratified for residual tumor (RT) after surgery (more or less than 2 cm) a high level of CDK12 predicted a worse prognosis for patients with a RT smaller than 2 cm than those with lower CDK12 levels but also RT < 1 cm (HH:1.295, 95% CI 1.016–1.651; p = 0.0367) (Figure 4D).