BRCA1 and oral cavity squamous cell carcinoma: The aim of the present study was to investigate the relationship between the expression of BRCA1 status and various clinicopathologic parameters and immunohistochemical markers (such as p53, γH2AX and RAD51) in two cohorts of oral squamous cell carcinoma samples and to evaluate the prognostic relevance of all variables in terms of disease-specific survival.