current data implicating an etiological role of human papillomavirus ( hpv ) infections in precancer lesions ( intraepithelial neoplasia ) and squamous cell carcinoma of both the genital tract and other sites ( oral cavity , larynx , skin , esophagus , nasal cavity , bronchus ) can be summarized as follows : a ) hpv involvement in benign , precancer , and malignant genital squamous cell lesions has been demonstrated by morphological , immunohistochemical and dna hybridization techniques ;
C0007137
squamous cell
C1518245
malignant