Colposcopy and the CO2 laser for treatment of cervical intraepithelial neoplasia. An analysis of seven years' experience.

We performed a study to determine the efficacy of laser therapy for the three grades of cervical intraepithelial neoplasia. Two hundred ninety-two patients were studied. Over 90% of the cases occurred in women between 20 and 30 years of age. Among the 21 patients (7%) with persistent disease, 12 (86%) of the cases were diagnosed within the first six months after laser treatment. Those patients were retreated. The overall cure rate in the study population was 96%.