Intravitreal bevacizumab (Avastin) treatment of retinal angiomatous proliferation

Abstract

Purpose: To report our short-term experience with intravitreal bevacizumab treatment of retinal angiomatous proliferation (RAP) in neovascular age-related macular degeneration (AMD). Methods: A retrospective, interventional case series was performed that included 13 patients who received intravitreal injection of bevacizumab (1.25 mg) for treatment of RAP and completed 12 weeks of follow-up. Ophthalmic assessment included determination of best-corrected Snellen visual acuity (BCVA), complete ocular examination, fluorescein angiography, and optical coherence tomography (OCT). Injections were repeated if no further improvement or worsening was observed after an initial favorable functional and/or anatomical response. Main outcome measures were BCVA and central macular thickness (CMT) measured by OCT. Results: Twelve eyes (92.3%) had stable or improved BCVA, and 8 eyes (61.5%) had at least 2 lines of vision improvement. The average BCVA improved from 20/203 at baseline to 20/113 at 12 weeks (P = 0.001). Average CMT improved from 369 μm at baseline to 216 μm (P = 0.016) and 315 μm (P = 0.020) at 8 weeks and 12 weeks, respectively. Six eyes underwent fluorescein angiography at the 12-week follow-up visit; 3 (50%) of these eyes had decreased leakage compared with baseline. Both stabilization of vision and improved CMT were maintained for at least 8 weeks after a single injection in almost all eyes. No significant side effects were observed. Conclusion: These short-term data suggest that bevacizumab is a viable treatment option for RAP in AMD. The initial treatment effect appears to be maintained for at least 8 weeks.