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Autonomic dysfunction-dominant phenotype in a Chinese family with biallelic GGC repeat expansions in NOTCH2NLC
Bin Chen1,2, Jing Jing1,2,3, Gehong Dong4
1Department of Neurology, Beijing Tiantan Hospital, Capital Medical University, No.119 South 4Th Ring West Road, Fengtai District, Beijing, 100070, China.
Abstract:
The GGC repeat expansions in the NOTCH2NLC gene are associated with multiple neurodegenerative disorders. Herein, we report the clinical phenotype in a family with biallelic GGC expansions in NOTCH2NLC. Autonomic dysfunction was a prominent clinical manifestation in three genetically confirmed patients without dementia, parkinsonism, and cerebellar ataxia for > 12 years. A 7-T brain magnetic resonance imaging in two patients revealed a change in the small cerebral veins. The biallelic GGC repeat expansions may not modify the disease progression in neuronal intranuclear inclusion disease. Autonomic dysfunction-dominant may expand the clinical phenotype of NOTCH2NLC.
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