“…In 1983, human papillomavirus (HPV) was first described as a factor involved in the development of OSCC (Syrjänen et al, 1983). From then on, the presence of different types of HPV has been detected in oral cancers, which are mainly HPV16 and HPV18 with noticeable detection rates from 8% to 64% (Kansky, et al, 2003;Lo Muzio et al, 2004;Hansson et al, 2005). The presence of HPV DNA in a significant fraction of oral cancer, combined with the evidence that HPV status may affect the clinical outcomes in cervical or anogenital cancer patients (Lombard et al, 1998), led to a number of studies pointing a possible use of HPV diagnosis as an additional aid for survival prognosis in oral cancers (Schwartz et al, 2001;Ritchie et al, 2003), while other groups found no differences in survival by HPV status (Brandwein et al, 1994).…”