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  • Title: Treatment of recurrent corneal and conjunctival intraepithelial neoplasia with topical interferon alfa 2b.
    Author: Boehm MD, Huang AJ.
    Journal: Ophthalmology; 2004 Sep; 111(9):1755-61. PubMed ID: 15350333.
    Abstract:
    OBJECTIVE: To evaluate topical interferon alfa 2b (IFNalpha2b) as a single therapeutic agent in the treatment of presumed recurrent corneal and conjunctival intraepithelial neoplasia. DESIGN: Noncomparative, retrospective case series. PARTICIPANTS: Seven consecutive patients with recurrent corneal and conjunctival intraepithelial neoplasia diagnosed at the University of Minnesota from July 2000 to November 2003 were studied retrospectively. All patients had a history of histologically proven primary corneal and conjunctival intraepithelial neoplasia and were treated by surgery, cryotherapy, radiation, and/or topical mitomycin C before recurrence. INTERVENTION: Patients with a clinical diagnosis of recurrent corneal and conjunctival intraepithelial neoplasia were treated with recombinant topical IFNalpha2b drops (1 million IU/ml) 4 times daily until lesion resolution was noted. MAIN OUTCOME MEASURES: A review of medical records was performed to assess the duration of and response to treatment with topical IFNalpha2b, defined by clinical resolution of corneal and conjunctival intraepithelial neoplasia. RESULTS: The average age of the 7 patients at the initiation of topical IFNalpha2b treatment for presumed recurrent corneal and conjunctival intraepithelial neoplasia was 68.7 years (range, 54-88). Six of 7 patients had successful treatment of recurrent corneal and conjunctival intraepithelial neoplasia lesions with topical IFNalpha2b treatment. The average length of IFNalpha2b treatment to resolution of recurrent corneal and conjunctival intraepithelial neoplasia was 14.5 weeks (range, 5-24). After treatment with topical IFNalpha2b for recurrent corneal and conjunctival intraepithelial neoplasia, 2 patients had another recurrence of corneal and conjunctival intraepithelial neoplasia, noted at 1 year and 2 months, respectively. The average post-treatment follow-up was 11.7 months (range, 8-17) after the resolution of recurrent corneal and conjunctival intraepithelial neoplasia. No side effects of treatment were noted in any patient. CONCLUSIONS: Topical IFNalpha2b as a single therapeutic agent is an effective treatment of presumed recurrent corneal and conjunctival intraepithelial neoplasia. It offers the benefits of topical therapy and avoids the risks of surgical or other interventions-specifically, ocular surface toxicity, cicatricial conjunctival changes, and limbal stem cell deficiency. Larger controlled studies with longer follow-up periods are recommended to confirm the long-term efficacy and safety of this topical treatment.
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