Randomized Controlled Trial of Topical Mitomycin C for Ocular Surface Squamous Neoplasia : Early Resolution

ObjectiveTo assess the efficacy and safety of mitomycin C in the treatment of ocular surface squamous neoplasia.DesignProspective, randomized, controlled, masked, single-center trial.ParticipantsForty-eight consecutive patients with biopsy-proven noninvasive ocular surface squamous neoplasia.InterventionMitomycin C (0.4 mg/ml) or a placebo was administered as 1 drop 4 times a day for 3 weeks, with crossover of drops if there was no regression within 6 weeks.Main Outcome MeasuresSuccessful treatment was measured as complete resolution of the neoplasia by slit-lamp examination within 6 to 8 weeks of treatment, with a secondary end point of histological resolution by 6 weeks.ResultsNone of 20 in the placebo group resolved clinically, whereas 24 of 26 in the mitomycin group resolved, giving a relative resolution rate of mitomycin versus placebo of 40.87 (95% confidence interval [CI], 1.01–1656.8). There were no complications. There was no statistical treatment effect on histological resolution, with a resolution rate of mitomycin versus placebo of 1.37 (95% CI, 0.34–5.42).ConclusionsMitomycin C (0.4 mg/ml) eyedrops used 4 times a day for 3 weeks is an effective agent to cause early clinical resolution of noninvasive ocular surface squamous neoplasia.