Successful Treatment with Mitomycin C Eye Drops for Conjunctival Diffuse Intraepithelial Neoplasia with Sebaceous Features

Conjunctival biopsy specimens from the right eye of a 66-year-old woman who had a 10-year history of an irritated and swollen right upper eyelid were diagnosed as diffuse intraepithelial neoplasia with sebaceous features. The treatment consisted of two courses, 2 weeks apart, of 0.02% mitomycin C eye drops. Biopsies performed after completion the second course showed no evidence of neoplastic involvement. Severe trichiasis that developed after the biopsies was managed surgically. Today, 46 months after completion of mitomycin C treatment, the conjunctiva shows no inflammation, the eyelid is not swollen or irritated, and there is no clinical indication of recurrence. This case report demonstrates that conjunctival diffuse intraepithelial neoplasia of the conjunctiva with sebaceous features can be successfully treated by treatment with mitomycin C drops.