Clinicians from the USC School of Dentistry unravel connection between the incidence of oral cancer and race and ethnicity– as part of first epidemiological study of oral cancer in California. Dr. Satish Kumar and Dr.Parish Sedghizadeh, clinical professors in the school’s Division of Diagnostic Sciences, gleaned through 20 years of records from the California Cancer Registry (CCR)—the state’s cancer surveillance database—for the incidence rates of invasive squamous cell carcinoma, the most common form of oral cancer.