Early Findings in Neonatal Cases of RYR1–Related Congenital Myopathies

Eleonora Mauri, Daniela Piga, Alessandra Govoni, Roberta Brusa, Serena Pagliarani, Michela Ripolone, Robertino Dilena, Claudia Cinnante, Monica Sciacco, Denise Cassandrini, Vincenzo Nigro, Nereo Bresolin, Stefania Corti, Giacomo P. Comi, Francesca Magri

Research output: Contribution to journalArticlepeer-review

Abstract

Ryanodine receptor type 1-related congenital myopathies are the most represented subgroup among congenital myopathies (CMs), typically presenting a central core or multiminicore muscle histopathology and high clinical heterogeneity. We evaluated a cohort of patients affected with Ryanodine receptor type 1-related congenital myopathy (RYR1-RCM), focusing on four patients who showed a severe congenital phenotype and underwent a comprehensive characterization at few months of life. To date there are few reports on precocious instrumental assessment. In two out of the four patients, a muscle biopsy was performed in the first days of life (day 5 and 37, respectively) and electron microscopy was carried out in two patients detecting typical features of congenital myopathy. Two patients underwent brain MRI in the first months of life (15 days and 2 months, respectively), one also a fetal brain MRI. In three children electromyography was performed in the first week of life and neurogenic signs were excluded. Muscle MRI obtained within the first years of life showed a typical pattern of RYR1-CM. The diagnosis was confirmed through genetic analysis in three out of four cases using Next Generation Sequencing (NGS) panels. The development of a correct and rapid diagnosis is a priority and may lead to prompt medical management and helps optimize inclusion in future clinical trials.

Original languageEnglish
Article number664618
JournalFrontiers in Neurology
Volume12
DOIs
Publication statusPublished - Jun 28 2021

Keywords

  • congenital myopathy
  • fetal brain MRI
  • muscle biopsy
  • muscle MRI
  • neonatal
  • RyR1

ASJC Scopus subject areas

  • Neurology
  • Clinical Neurology

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