Classification of Mucosal HPV Infections 1. High-risk HPV Types (16, 18, 31, 33, 45, 52, and 58) • High- or low-grade lesions of the genital tract • Cancers include - Cervical - Anal - Penile - Vaginal - Vulvar - Oropharyngeal 2. Low-risk HPV Types (6 and 11) • Low-grade lesions of genital tract • Anogenital warts • Recurrent respiratory papillomatosis