CCNB1 and oral cavity squamous cell carcinoma: Cyclin B1 overexpression among histological grades of conventional oral squamous cell carcinoma (COSCC), as well as comparison with verrucous carcinoma (VC) has been less investigated.Study Design: Immunohistochemical expression of cyclin B1 was compared with various clinicopathological features in 30 primary COSCC and 31 primary VC cases.Result: Cyclin B1 showed significant overexpression for some clinical features for both the variants of oral squamous cell carcinoma.