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要約 目的:新生血管型加齢黄斑変性(AMD)に対する治療をアフリベルセプト硝子体内注射(IVA)からファリシマブ硝子体内注射(IVF)に切り替えた症例の12か月経過後の検討を行う。
対象と方法:対象は,千葉大学医学部附属病院でIVAによるtreat and extend(TAE)中のAMD症例のうち,投与間隔が10週以下の症例で,2022年9月〜2023年9月の間にIVFに切り替えた29例30眼。投与間隔は直前のIVAと同間隔とし,TAEで継続投与した。切り替え前,12か月後の視力,中心網膜厚(CRT),中心脈絡膜厚(CCT),投与間隔,滲出なしの割合について検討した。
結果:切り替え後12か月時点でIVFを継続していた症例(継続群)は19眼(63.3%),滲出の悪化により他剤へ変更した症例は11眼(36.7%)であった。継続群の切り替え前,12か月後の平均視力(logMAR)は0.17±0.14,0.20±0.19(p=0.66),平均CRTは246±92μm,238±81μm(p=0.46),平均CCTは206±93μm,194±65μm(p=0.22),滲出なしの割合は36.8%(7/19),57.9%(11/19)(p=0.15)であり,いずれも有意差はなかった。平均投与間隔は継続群で7.4±1.7,9.1±1.3週(p<0.01)であり,有意に延長された。
結論:IVAからIVFへの切り替えは63.3%の症例で有効であり,これらの症例では,病状の活動性を抑えつつ,投与間隔の延長が可能であった。
Abstract Purpose:To evaluate the efficacy of switching from intravitreal aflibercept to faricimab for the treatment of neovascular age-related macular degeneration(nAMD) over 12 months.
Methods:This retrospective study included 30 eyes of 29 patients with nAMD who were treated with aflibercept using the treat-and-extend protocol at Chiba University Hospital. We examined patients with a treatment interval of 10 weeks or less before switching to faricimab between September 2022 and September 2023.
The initial treatment interval for faricimab was maintained for the same duration as that for the prior aflibercept treatment. The best-corrected visual acuity(BCVA), central retinal thickness(CRT), central choroidal thickness(CCT), treatment intervals, and prevalence of eyes with no fluid were evaluated before and 12 months after the switch.
Results:The average age of patients was 80.2±7.8 years. At 12 months, 19 patients' eyes(63.3%) were continued with faricimab treatment(Group 1), whereas 11 eyes(36.7%) were switched to other agents due to worsening exudation(Group 2). In Group 1, the mean BCVA(log of the minimum angle of resolution) was 0.17±0.14 at the baseline and 0.20±0.19(p=0.66) at 12 months, and the mean CRT was 246±92 μm at the baseline and 238±81 μm(p=0.46) at 12 months, whereas mean CCT was 206±93 μm at the baseline and 194±65 μm(p=0.22) at 12 months. The percentage of patients with no fluid in Group 1 was 36.8%(7/19) at baseline and 57.9%(11/19) at 12 months. There were no significant differences in BCVA, CRT, CCT, and the percentage of no fluid between baseline and 12 months. The mean treatment interval was significantly extended from 7.4±1.7 weeks at the baseline to 9.1±1.3 weeks at 12 months(p<0.01).
Conclusion:Switching to faricimab was effective in 63.3% of cases. In these cases, it was possible to control the disease activity and extend the treatment interval.

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