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Incidence and Risk Factors for Macular Atrophy in Acquired Vitelliform Lesions

Published:August 11, 2021DOI:https://doi.org/10.1016/j.oret.2021.07.009

      Purpose

      To study the time course to macular atrophy (MA) and associated risk factors in eyes with acquired vitelliform lesions (AVLs) as they vary between patients and between eyes of an individual.

      Design

      Single-center, retrospective, observational cohort study.

      Participants

      Consecutive patients registered between January 2009 and January 2014 with first diagnosis of AVL confirmed by multimodal imaging were included. Eyes with baseline MA or choroidal neovascularization were excluded.

      Methods

      Patient demographics were collected. Serial OCT scans and fundus autofluorescence (FAF) scans were graded and analyzed. Turnbull’s estimator was used, and time was censored at 5 years. Multivariable Weibull parametric proportional hazard models were used to assess the association of risk factors with MA after adjustment for age and gender. Hazard ratios (HRs) are reported with 95% confidence interval (CI).

      Main Outcome Measures

      Time to the first OCT evidence of MA stratified by presenting visual acuity (VA) and AVL lesion subtypes. Secondary outcome included risk factors for incident MA.

      Results

      A total of 237 eyes (132 patients) met the inclusion criteria. Incident MA was detected in 52 of 237 eyes (21.9%) by 5 years. Stratified by baseline VA, 40.3% of eyes with VA ≤70 letters developed atrophy within 5 years of first diagnosis in contrast to 10.3% eyes with VA >70 letters (P < 0.001). Based on lesion type only, 12.9% of eyes with vitelliform lesion at baseline developed MA versus 39.8% and 44.2% of eyes with pseudohypopyon or vitelliruptive lesion type, respectively. In adjusted analysis, baseline factors associated with increased risk of MA included VA ≤70 letters (hazard ratio [HR], 5.54; 95% confidence interval [CI], 2.30–13.34), base width (HR, 1.22; 95% CI, 1.16–1.28), maximum height (HR, 2.61; 95% CI, 1.82–3.74), presence of subretinal drusenoid deposits (SDDs) (HR, 2.83; 95% CI, 1.34–5.96), and disrupted external limiting membrane (ELM) (HR, 2.81; 95% CI, 1.34–5.86).

      Conclusions

      Baseline VA of ≤70 letters (Snellen ≤20/40) and pseudohypopyon or vitelliruptive lesion type attribute the highest risk for MA. Other prognostic indicators for MA include baseline presence of SDD, disrupted ELM, and larger lesion area.

      Keywords

      Abbreviations and Acronyms:

      AMD (age-related macular degeneration), AOFVD (adult-onset foveomacular dystrophy), AVL (acquired vitelliform lesion), CI (confidence interval), CNV (choroidal neovascularization), ELM (external limiting membrane), ETDRS (Early Treatment Diabetic Retinopathy Study), EZ (ellipsoid zone), FAF (fundus autofluorescence), HR (hazard ratio), IQR (interquartile range), MA (macular atrophy), RPE (retinal pigment epithelium), SDD (subretinal drusenoid deposit), SD-OCT (spectral-domain OCT), VA (visual acuity)
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