Plk3 was lowly expressed, whereas Plk2 was expressed highly in tumor tissues compared to paired normal tissues.
Plk2 was previously reported as a tumor suppressor gene, while our findings suggest an oncogenic role for Plk2 in colorectal cancer.
Plk2 represents an independent marker for predicting prognosis of colorectal cancer patients.
Plk2 promotes tumor growth and inhibits apoptosis by targeting Fbxw7/Cyclin E pathway.