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A case of pediatric mitochondrial myopathy, encephalopathy, lactic acidosis and stroke-like episodes(MELAS)with visual field impairment Yumi Saito 1 , Yoshihiro Nakagawa 1 , Yasuyuki Suzuki 1 1Department of Ophthalmology, Tokai University Hospital pp.738-744
Published Date 2023/6/15
DOI https://doi.org/10.11477/mf.1410214823

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Abstract Purpose:To present a case report of pediatric mitochondrial myopathy, encephalopathy, lactic acidosis, and stroke-like episodes(MELAS)with visual field impairment and successful mitochondrial cocktail therapy comprising L-arginine and taurine.

Case:A 10-year-old girl, presented headache and general malaise two week ago. Simple head computed tomography(CT)revealed a low absorption zone in the left occipital lobe. She also had a right visual field defect, and was subsequently referred to our hospital.

Findings:The best corrected visual acuity was 1.2 in both eyes, with no remarkable findings. Goldmann perimetry confirmed right homonymous hemianopia. Magnetic resonance imaging(MRI)revealed a contrast mismatch between the intensity at the vascular and innervation region in the left temporal and occipital lobes. MR spectroscopy revealed a lactate peak consistent with the abnormal intensity. Laboratory data showed an increase in the lactic acid level, and mitochondrial genetic testing showed an A3243G point mutation. The patient was diagnosed with MELAS. Several supplementations, including vitamins, L-arginine, and taurine, were induced in the mitochondrial cocktail treatment. Notable improvement was observed in the patient's symptoms, MRI findings, and the right visual field defect.

Conclusions:We encountered a case of pediatric MELAS with improved right visual field defect. Pediatric type MELAS is may manifest with more severe symptoms than the adult type. Hence, careful follow-up is necessary.


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電子版ISSN 1882-1308 印刷版ISSN 0370-5579 医学書院

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