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  • Title: Pseudodrusen pattern and development of late age-related macular degeneration in the fellow eye of the unilateral case.
    Author: Sakurada Y, Sugiyama A, Kikushima W, Yoneyama S, Tanabe N, Matsubara M, Iijima H.
    Journal: Jpn J Ophthalmol; 2019 Sep; 63(5):374-381. PubMed ID: 31267312.
    Abstract:
    PURPOSE: To investigate whether the development of late age-related macular degeneration (AMD) in fellow eyes with pseudodrusen is associated with the pseudodrusen pattern in patients with unilateral exudative AMD. STUDY DESIGN: Retrospective observational study. METHODS: A retrospective analysis was performed on 73 patients with unilateral exudative AMD showing pseudodrusen in their fellow eyes. Eyes were classified according to pseudodrusen pattern, which was determined based on maximum pseudodrusen ribbon length. RESULTS: During the mean follow-up period of 35.5±18.6 months, 21 (28.8%) eyes developed late AMD. Among these eyes, 15 (71%) developed exudative AMD and six (29%) developed geographic atrophy (GA). Development of late AMD in fellow eyes occurred with significantly more prevalence in patients showing a ribbon-dominant type pseudodrusen pattern in their fellow eye than dot-dominant type (P=0.0005, log-rank test). Cox-regression analysis revealed that development of late AMD in fellow eyes is associated with the presence of ribbon-dominant pseudodrusen in the fellow eyes (hazard ratio 4.15, 95% confidence interval (CI) 1.59-10.8), along with older age (hazard ratio 1.10, 95% CI 1.03-1.17), a history of smoking (hazard ratio 17.2, 95% CI 1.11-263), the presence of large soft drusen in the fellow eye. (hazard ratio 5.49, 95% CI 1.29-21.1) and retinal angiomatous proliferation (hazard ratio 5.02, 95% CI 1.90-13.2) CONCLUSIONS: Fellow eyes with ribbon-dominant pseudodrusen in patients with unilateral exudative AMD are likely to develop late AMD.
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