Gray Hyper-Reflective Subretinal Exudative Lesions in Exudative Age-Related Macular Degeneration

Abstract

To investigate the effects of ranibizumab 0.5 mg on gray hyper-reflective subretinal lesions diagnosed by spectral-domain optical coherence tomography (SD OCT) in patients with exudative age-related macular degeneration (AMD). Retrospective interventional study. Data from 28 consecutive patients affected with neovascular AMD that presented subretinal hyper-reflective lesions as visualized by SD OCT were collected. Gray hyper-reflective subretinal lesion characteristics were analyzed before and after intravitreal ranibizumab 0.5 mg injection. Thirty eyes of 28 patients (5 male, 23 female, aged 57-91 years) were included. At study entry, gray lesion was associated with exudative features in 24 of 30 eyes (80%), including subretinal fluid (SRF) in 20 of 30 eyes (67%) and retinal cystoid spaces in 11 of 30 eyes (37%). Twenty-four eyes with exudative features at study entry received prompt treatment; 6 eyes without exudative features at study entry received deferred treatment (after 1 month observation), when exudative signs emerged (SRF in 3/6 eyes and retinal cystoid spaces in 5/6 eyes). Ninety-three percent of the gray lesions responded to ranibizumab treatment at 2 months and 77% at 6 months. Gray hyper-reflective subretinal lesion thickness was significantly reduced after treatment at both 2 months (from 482±116 μm to 367±102 μm, P<.0001) and 6 months (from 482±116 μm to 369±71 μm, P<.0001). Our findings suggest that gray hyper-reflective subretinal lesions might be considered as a qualitative criterion for retreatment of exudative AMD. They may represent an early sign of active choroidal neovascularization, and should prompt to early treatment.