INTRAVITREAL METHOTREXATE INJECTION FOR THE TREATMENT AND PREVENTION OF PROLIFERATIVE VITREORETINOPATHY

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Abstract
Purpose: To report on our experience using intravitreal methotrexate (MTX) in patients with retinal detachment associated with proliferative vitreoretinopathy and/or open globe injury. Methods: This study performed a retrospective chart review of a consecutive series of 21 eyes of 21 patients who underwent serial intravitreal MTX injection for treatment and/or prevention of proliferative vitreoretinopathy from December 2021 to January 2024. Results: Twenty-one patients underwent pars plana vitrectomy, membrane peeling, laser photocoagulation, silicone oil infusion, and intravitreal MTX injection. Postoperatively, all eyes received a series of intravitreal MTX (400 μg/0.1 mL) injections. Optimally, injections were administered weekly for 8 weeks and every 2 weeks for four weeks for a total of 13 injections, beginning intraoperatively at the conclusion of retinal reattachment surgery. Mean baseline preoperative and postoperative visual acuity was logarithm of the minimum angle of resolution 3.2 (approximately hand motions vision) and 2.5 (between CF and hand motions vision), respectively, yielding an average improvement in visual acuity of 0.7 logarithm of the minimum angle of resolution units (0 ETDRS lines/letters). These 21 patients received an average of 10.5 injections. With a single operation, detachments in 19 (90%) of 21 eyes were successfully reattached. Corneal epithelial defects were noted in 7 (33%) of 21 patients. Conclusion: Serial intravitreal MTX injection was associated with 90% single operation retinal reattachment rate in the setting of retinal detachment with proliferative vitreoretinopathy or retinal detachment at high risk of proliferative vitreoretinopathy.

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