Conversion to aflibercept for diabetic macular edema unresponsive to ranibizumab or bevacizumab
Authors Lim L, Ng W, Mathur R, Wong D, Wong E, Yeo I, Chueng CMG, Lee SY, Wong TY, Papakostas T, Kim L
Received 25 January 2015
Accepted for publication 21 May 2015
Published 16 September 2015 Volume 2015:9 Pages 1715—1718
Checked for plagiarism Yes
Review by Single-blind
Peer reviewer comments 4
Editor who approved publication: Dr Scott Fraser
Laurence S Lim,1,2 Wei Yan Ng,2 Ranjana Mathur,2 Doric Wong,2 Edmund YM Wong,2 Ian Yeo,2 Chui Ming Gemmy Cheung,2 Shu Yen Lee,2 Tien Yin Wong,2 Thanos D Papakostas,1 Leo A Kim1
1Retina Service, Massachusetts Eye and Ear Infirmary, Harvard Medical School, Boston, MA, USA; 2Vitreoretinal Department, Singapore National Eye Centre, Singapore
Background: The purpose of this study was to determine if eyes with diabetic macular edema (DME) unresponsive to ranibizumab or bevacizumab would benefit from conversion to aflibercept.
Methods: This study was conducted as a retrospective chart review of subjects with DME unresponsive to ranibizumab and/or bevacizumab and subsequently converted to aflibercept.
Results: In total, 21 eyes from 19 subjects of mean age 62±15 years were included. The majority of subjects were male (63%). The median number of ranibizumab or bevacizumab injections before switching to aflibercept was six, and the median number of aflibercept injections after switching was three. Median follow-up was 5 months after the switch. Mean central foveal thickness (CFT) was 453.52±143.39 mm immediately prior to the switch. Morphologically, intraretinal cysts were present in all cases. Mean CFT after the first injection decreased significantly to 362.57±92.82 mm (Wilcoxon signed-rank test; P<0.001). At the end of follow-up, the mean CFT was 324.17±98.76 mm (P<0.001). Mean visual acuity was 0.42±0.23 logMAR just prior to the switch, 0.39±0.31 logMAR after one aflibercept injection, and 0.37±0.22 logMAR at the end of follow-up. The final visual acuity was significantly better than visual acuity before the switch (P=0.04).
Conclusion: Eyes with DME unresponsive to multiple ranibizumab/bevacizumab injections demonstrate anatomical and visual improvement on conversion to aflibercept.
Keywords: diabetic retinopathy, macular edema, aflibercept, bevacizumab, ranibizumab
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