Table 4. Oropharyngeal squamous cell carcinomas with >1 HPV type, select US registries, 1995–2005* .

Type combination	No. cases
HPV-16 and -33	6
HPV-16 and -18	3
HPV-16 and -31	3
HPV-16 and -35	2
HPV-16 and -45	1
HPV-16 and -52	1
HPV-16 and -54	1
HPV-16 and -59	1
HPV-16 and -83	1
HPV-18 and -35	1
HPV-33 and -39	1
HPV-39 and -56	1

*No cases with >2 types were found; HPV, human papillomavirus.