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Neuromyelitis optica spectrum disorders in Japanese sisters Satoshi Oshio 1,2 , Tomoko Tsukahara-Kawamura 1 , Kohei Asano 1 , Tsuyoshi Oshio 1,2 , Ayumi Oka 1 , Tomohiro Yasutake 1 , Taku Matsumoto 1 , Kazuhiro Harada 1 , Hiroaki Ozaki 1 , Masatoshi Hirayama 1 1Department of Ophthalmology, Faculty of Medicine, Fukuoka University 2Department of Ophthalmology, Snow White Virgin Society, St.Mary's Hospital pp.993-999
Published Date 2026/8/15
DOI https://doi.org/10.11477/mf.037055790800080993

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Abstract Purpose:Neuromyelitis Optica Spectrum Disorder(NMOSD) is an autoimmune central nervous system disease characterized by optic neuritis and transverse myelitis, involving anti-aquaporin-4(AQP4) antibodies. While NMOSD is predominantly sporadic, familial cases account for approximately 3% of reports, suggesting a genetic component. We report on two sibling sisters with NMOSD who presented at a relatively advanced age.

Cases:The older sister developed right optic neuritis at age 62, and over the next eight years, she experienced five recurrences in each eye. The younger sister developed left optic neuritis at age 68. Both cases tested positive for anti-AQP4 antibodies. The sisters final visual acuity was hand motion in both eyes for the older sister, and the younger sister had left eye vision of 0.2, with incomplete visual field recovery. MRI showed no demyelinating lesions in the older sister, while the younger sister demonstrated findings suggestive of demyelination in the parietal lobe and brain stem during the course of the disease. Human leukocyte antigen(HLA) analysis revealed that the older sister carried HLA-DPB1*05:01, an HLA associated with NMOSD onset. Satralizumab(SAT) was initiated for relapse prevention. Subsequently, the older sister remained relapse-free for approximately 4 years, and the younger sister for approximately 1 year.

Conclusion:We report two cases of NMOSD occurring in relatively older sisters. Although visual function prognosis was poor in both cases, no relapses have been observed since SAT initiation, suggesting its efficacy in the long-term management of NMOSD with late-onset.


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

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