TP53 and neoplasm: The AT and Pro variant alleles of p73 and p53 were significantly more common among HPV16-positive patients (26.1% for p73 and 23.7% for p53) than among HPV16-negative patients (16.5% for p73 and 15.2% for p53) (P = 0.020 for p73 and P = 0.043 for p53), indicating that the AT and Pro alleles may be associated with tumor HPV16-positivity among oropharyngeal cancer patients.