Qualitative analysis by OCTA in patients with choroidal neovascularization secondary to angioid streaks as predictors of disease recurrences over time

Abstract

Background: To report the risk of exudation recurrence and long-term outcomes in patients with choroidal neovascularization secondary to angioid streaks, according to its morphology and characteristics by optical coherence tomography angiography. Methods: Retrospective analysis of electronic medical records from three hospitals. We enrolled patients with a clinical diagnosis of angioid streaks choroidal neovascularization that had a minimum follow-up of 12 months. From each record, we extracted general demographic data, best corrected visual acuity (baseline, before and after each disease recurrence and last on file), type of treatment, time between last intravitreal injection and disease recurrence, and classification of the neovascular lesion morphology by optical coherence tomography, and optical coherence tomography angiography. Patients with myopic choroidal neovascularization were used as controls. Interobserver agreement was assessed with a Cohen-Kappa test. The Odds ratio was calculated with a chi2 test for significance. Visual acuity change through time was assessed with an ANOVA for repeated measurements with an alpha value of 0.05 for statistical significance. Results: We enrolled 30 patients in the study group and 14 in the control group. In the study group, the baseline and final BCVA was 0.861 ± 0.59 and 1.095 ± 0.61 logMAR (p=0.1). Control group: 1.045 ± 0.57 and 0.617 ± 0.53 logMAR (p<0.05). In the study group, the predominant CNV type by OCTA was mixed (37%), and interlacing (57%) in the control group. Mixed and cog-wheel patterns at baseline had increased Odds for recurrence in the study group (1.2 to 7.4) although it was not significant. Patients in the study group required fewer intravitreal injections on each recurrence episode to achieve disease control (3.5±1.5 vs.1.4±0.2, p<0.01). Conclusions: The benefits of anti-VEGF treatment are lost over time in patients with angioid streaks and CNV. Lesion characteristics by optical coherence tomography angiography could help physicians predict the risk of recurrence. Trial Registration:Retrospective registered, and IRB approved.