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要約 目的:視神経炎の治療前後での乳頭周囲網膜神経線維層厚(cpRNFLT)を測定し,抗アクアポリン(AQP)4抗体の有無による違いを報告する。
対象と方法:視神経炎の24例27眼を対象とした。男性6眼,女性21眼で,年齢は平均53歳であった。抗AQP抗体は6眼が陽性,21眼が陰性であった。治療前と治療後6か月後までの視力とcpRNFLTを診療録に基づいて測定した。
結果:抗AQP抗体陽性群でのcpRNFLTは,治療開始の2週後から減少し,その減少率は抗AQP抗体陰性群よりも有意に顕著であった(マン・ホイットニーのU検定)。治療前と比較し,6か月後までの全期間で平均視力は改善したが,両群間に有意差はなかった(ウィルコクソンの符号付順位検定)。
結論:抗AQP抗体陽性群の視神経炎は,陰性群よりも治療開始後のcpRNFLTの減少が大きかった。
Abstract Purpose:To report changes in circumpapillary retinal nerve fiber thickness in optic neuritis in cases positive and negative for anti-aquaporin-4 autoantibody.
Cases and Method:This retrospective study was made on 27 eyes of 24 cases with optic neuritis. The series comprised 6 male and 21 female eyes. The age averaged 53 years. Anti-aquaporin-4 autoantibody was positive in 6 eyes and negative in 21 eyes. The cases were evaluated regarding visual acuity and circumpapillary retinal nerve fiber thickness for 6 months after start of treatment.
Results:Circumpapillary retinal nerve fiber thickness started to decrease 2 weeks after start of treatment in eyes positive for anti-aquaporin-4 autoantibody. The decrease was significantly greater than in autoantibody-negative ones. Visual acuity improved throughout the course of treatment up to 6 months after start of treatment. There was no difference between autoantibody-positive and -negative eyes.
Conclusion:Decrease in circumpapillary retinal nerve fiber thickness in optic neuritis was greater in eyes positive for anti-aquaporin-4 autoantibody than in negative ones.
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