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  • Title: Primary intravitreal bevacizumab for subfoveal choroidal neovascularization in age-related macular degeneration: results of the Pan-American Collaborative Retina Study Group at 12 months follow-up.
    Author: Arevalo JF, Fromow-Guerra J, Sanchez JG, Maia M, Berrocal MH, Wu L, Saravia MJ, Costa RA, Pan-American Collaborative Retina Study Group.
    Journal: Retina; 2008; 28(10):1387-94. PubMed ID: 18827735.
    Abstract:
    PURPOSE: To report the 12-month anatomic and Early Treatment Diabetic Retinopathy Study best-corrected visual acuity (BCVA) response after primary intravitreal bevacizumab (Avastin, Genentech Inc., San Francisco, CA) (1.25 mg or 2.5 mg) in patients with subfoveal choroidal neovascularization secondary to age-related macular degeneration. METHODS: Sixty-three eyes of 63 consecutive patients with subfoveal choroidal neovascularization secondary to age-related macular degeneration, a mean age of 73.7 +/- 7.5 years and a minimum of 12 months (mean 55.5 +/- 6.2 weeks) of follow-up participated in this interventional retrospective multicenter case series in 7 centers from 6 countries. Patients were treated with at least 1 intravitreal injection of 1.25 mg or 2.5 mg of bevacizumab. Patients underwent Early Treatment Diabetic Retinopathy Study BCVA testing, ophthalmoscopic examination, optical coherence tomography, and fluorescein angiography at baseline and follow-up visits. Repeated measures analysis of variance was used to compare mean values. RESULTS: The mean number of intravitreal bevacizumab injections per eye was 3.5 (range, 1-8). Mean baseline BCVA was 20/320, logarithm of the minimum angle of resolution = 1.2, and mean final BCVA was 20/200, logarithm of the minimum angle of resolution = 1.0 (P < 0.001). Central macular thickness at baseline by optical coherence tomography had a mean of 389.2 +/- 149.6 microm which was significantly reduced to a mean of 281.0 +/- 96.1 microm, 268.2 +/- 82.6 microm, 262.6 +/- 92.3 microm, and 241.3 +/- 76.7 microm at 1, 3, 6, and 12 months after initial treatment, respectively (P < 0.0001). Ocular adverse events included transient increased intraocular pressure in 2 (3.1%) eyes, endophthalmitis in 2 (3.1%) eyes, and transient hypotony in 1 eye (1.1%). No systemic adverse events were observed. CONCLUSION: Primary intravitreal bevacizumab at doses of 1.25 mg or 2.5 mg seems to provide stability or improvement in BCVA, optical coherence tomography, and fluorescein angiography in subfoveal choroidal neovascularization secondary to age-related macular degeneration at 12 months.
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