Optic Atrophy and Generalized Chorea in a Patient Harboring an OPA10/RTN4IP1 Pathogenic Variant

Abstract

RTN4IP1 pathogenic variants (OPA10 syndrome) have been described in patients with early-onset recessive optic neuropathy and recently associated with a broader clinical spectrum, from isolated optic neuropathy to severe encephalopathies with epilepsy. Here we present a case of a patient with a complex clinical picture characterized by bilateral optic nerve atrophy, horizontal nystagmus, myopia, mild intellectual disability, generalized chorea, isolated small subependymal heterotopia, and asynchronous self-resolving midbrain MRI (magnetic resonance imaging) lesions. By using massive gene sequencing, we identified in this patient the c.308G > A (p.Arg103His) homozygous pathogenic variant in the RTN4IP1 gene. Complex movement disorders and relapsing-remitting neuroradiological lesions have not been previously reported in this condition. Our case expands the clinical spectrum of OPA10 syndrome and opens new opportunities for the molecular diagnosis.

Keywords

OPA10 syndrome - RTN4IP1 pathogenic variants - complex movement disorder - chorea - optic neuropathy

Publikationsverlauf

Eingereicht: 25. Juni 2019

Angenommen: 23. Januar 2020

Artikel online veröffentlicht:
11. Mai 2020

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