Oral cavity tumors in younger patients show a poor prognosis and do not contain viral RNA.
Brägelmann J, Dagogo-Jack I, El Dinali M, Stricker T, Brown CD, Zuo Z, Khattri A, Keck M, McNerney ME, Longnecker R, Bieging K, Kocherginsky M, Alexander K, Salgia R, Lingen MW, Vokes EE, White KP, Cohen EE, Seiwert TY. Oral cavity tumors in younger patients show a poor prognosis and do not contain viral RNA. Oral Oncol. 2013 Jun; 49(6):525-33.