Subclinical Leber's hereditary optic neuropathy with pediatric acute spinal cord onset: More than meets the eye

Eleonora Mauri, Robertino Dilena, Antonio Boccazzi, Dario Ronchi, Daniela Piga, Fabio Triulzi, Delia Gagliardi, Roberta Brusa, Irene Faravelli, Nereo Bresolin, Francesca Magri, Stefania Corti, Giacomo P. Comi

Research output: Contribution to journalArticlepeer-review

Abstract

Background: Leber's hereditary optic neuropathy (LHON) is a mitochondrial disease characterized by visual loss consequent to optic nerve atrophy. In some cases, LHON is associated with heterogeneous neurological extraocular manifestations and is referred to as "Leber plus disease"; rarely it is associated with a multiple sclerosis (MS)-like syndrome known as Harding disease, but no pediatric extraocular acute spinal onset is reported. Case presentation: We describe the case of a 5-year-old girl carrying the G3460A mtDNA mutation who was referred to clinical examination for bilateral upper and lower limb weakness with no sign of optic neuropathy. Spinal cord MRI showed hyperintense signal alterations in T2-weighted and restricted diffusion in DWI sequences in the anterior portion of the cervical and dorsal spinal cord resembling a spinal cord vascular injury. No association between this mutation and pediatric spinal cord lesions has previously been reported. Alternative diagnostic hypotheses, including infective, ischemic and inflammatory disorders, were not substantiated by clinical and instrumental investigations. Conclusions: Our case reports a novel pediatric clinical manifestation associated with the m.3460G > A mtDNA mutation, broadening the clinical spectrum of this disease. Early identification of new cases and monitoring of carriers beginning in childhood is important to prevent neurological deterioration and preserve long-term function.

Original languageEnglish
Article number220
JournalBMC Neurology
Volume18
Issue number1
DOIs
Publication statusPublished - Dec 27 2018

Keywords

  • Leber's hereditary optic neuropathy
  • Mitochondrial pathology
  • Pediatric
  • Spinal cord

ASJC Scopus subject areas

  • Clinical Neurology

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