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Two-year results for ranibizumab for radiation retinopathy (RRR): a randomized, prospective trial
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Two-year results for ranibizumab for radiation retinopathy (RRR): a randomized, prospective trial
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Two-year results for ranibizumab for radiation retinopathy (RRR): a randomized, prospective trial
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Journal Article
Two-year results for ranibizumab for radiation retinopathy (RRR): a randomized, prospective trial
2022
Overview
PurposeTo assess the efficacy of a treat-and-extend strategy with intravitreal ranibizumab for radiation-related macular edema.MethodsForty eyes with radiation-induced macular edema and decreased visual acuity were enrolled in the phase IIb, prospective clinical trial and randomized into 3 cohorts: (A) monthly ranibizumab, (B) monthly ranibizumab with targeted retinal photocoagulation (TRP), or (C) as-needed ranibizumab and TRP. In year 2, all subjects entered a treat-and-extend protocol for ranibizumab. The primary outcome measure was mean change in early treatment diabetic retinopathy study (ETDRS) best-corrected visual acuity (BCVA) from baseline.ResultsThrough year 1, the mean change in ETDRS BCVA was significantly different between the three cohorts (p < 0.001); cohort A saw the largest gain with + 4.0 letters. Significant anatomic improvements were also seen in all cohorts. Comparatively, through year 2, cohorts A, B, and C had a mean change in ETDRS BCVA of − 1.9, − 3.9, and + 1.3 letters, respectively; additionally, no significant differences were found in absolute ETDRS BCVA across time (ANOVA, p = 0.123). Overall, 90% of eyes maintained VA 20/200 or better and 33.3% of subjects gained at least one line of vision. There were no significant differences in mean central macular thickness for any cohort compared to baseline (p = 0.09). The presence of retinal hemorrhage and intraretinal exudates stayed consistent from year 1 to year 2 for all cohorts.ConclusionsAmong eyes with radiation-related macular edema, a treat-and-extend regimen with ranibizumab may not result in as many visual and anatomic improvements as monthly injections. However, treat-and-extend still may prevent serious visual complications compared to historical controls. Trial registrationClinicalTrials.gov Identifier: NCT02222610
