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要約 目的:急激な血糖コントロールにより網膜症が起こった若年発症2型糖尿病症例の報告。症例と経過:27歳女性が13歳のときに2型糖尿病と診断された。思春期から血糖コントロールが不良になり,19歳でインスリン治療を開始した。HbAlc値は常時10%以上で,血糖値は不安定で200~400mg/mlと高かった。検眼鏡と蛍光眼底造影で網膜症はなかった。入院加療の結果,血糖値は100mg/ml台に低下し,HbAlc値は3か月で5.6%に低下した。入院から7か月後に無数の点状と斑状出血が眼底全面に生じた。視力低下はなかったが,血管透過性が亢進し,無灌流野が出現していた。汎網膜光凝固を行い,以後1年後まで網膜症の悪化はない。結論:血糖コントロールが不良な若年者では,急激な血糖是正を契機として網膜症が発症することがあり,注意が必要である。
Abstract. Purpose:To report a case of juvenile type 2 diabetes mellitus who developed retinopathy after drastic control of glycemia. Case and Findings:A 27-year-old female was diagnosed with type 2 diabetes mellitus at the age of 13 years. Blood sugar level became unstable after adolescence. She started receiving insulin at the age of 19 years. Level of HbAlc remained over 10% with blood sugar level between 200 and 400mg/ml. Diabetic retinopathy was consistently absent by ophthalmoscopy and fluorescein angiography. She was hospitalized for treatment one year ago. Blood sugar decreased below 100mg/ml with decreased HbAlc to5.6% 3 months later. Seven months after hospitalization, numerous dot and blot hemorrhages appeared over the whole fundus. Fluorescein angiography showed increased permeability of retinal vessels and areas of nonperfusion. She received panretinal photocoagulation and has been doing well for one year until present. Conclusion:This case illustrates that drastic control of blood sugar may trigger acute onset and exacerbation of retinopathy in type 2 diabetes mellitus.
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