A case of conjunctiva-cornea intraepithelial neoplasia successfully treated with topical mitomycin C and interferon alfa-2b in cycles

Purpose: To report a case of conjunctiva-cornea intraepithelial neoplasia (CCIN) treated with topical mitomycin C (MMC) and interferon alfa-2b in cycles. Methods: A 52-year-old woman referred for limbal stem cell deficiency and epithelial defect was found instead to have CCIN. The diagnosis was confirmed by impression cytology and treated in cycles with topical 0.02% MMC for 14 days in the first cycle, 12 days in the second cycle, and 3 days in the third cycle followed by topical interferon alfa-2b 1 X 10(6) U/mL for 11 days. Result: Topical MMC for 2.5 cycles resulted in 95% reduction of CCIN and improvement of 2 lines of vision. Because of intolerance to MMC, she was switched to topical interferon alfa-2b for 11 days, resulting in total resolution of COIN, which lasted for at least 10 months. Conclusions: After differentiation from a persistent corneal epithelial. defect and limbal stem cell deficiency by dye staining and impression cytology, the patient in this case of CCIN was successfully treated with topical MMC and interferon alfa-2b in cycles.