Human fibroblast interferon in cervical and vulvar intraepithelial neoplasia associated with viral cytopathic effects. A pilot study.

Sixteen patients with cervical intraepithelial neoplasia (CIN), grades 2 and 3, and vulvar intraepithelial neoplasia (VIN), grade 3, associated with human papillomavirus (HPV) infection were treated with human fibroblast interferon (HFI). Treatment consisted of 2-3 X 10(6) IU/day injected intra- and perilesionally for five days per week for two to three weeks with or without topically applied cream (1.2 X 10(6) IU/day for five days). Eight complete and two partial regressions occurred. The duration of the response ranged from 4 to 20 months. Fever, chills and fatigue with or without headache were the side effects. Our preliminary results indicate that HFI was active against CIN and VIN associated with HPV infection.