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Leduc-Pessah H, Smith IC, Kernohan KD, Sampaio M, Melkus G, Strasser L, Chisholm C, Huang L, Hanes I, Tran MA, Venkateswaran S, Muir K, Charlesworth L, Warman-Chardon J. Congenital tremor and myopathy secondary to novel MYBPC1 variant. J Neurol Sci 2024; 457:122864. [PMID: 38185014 DOI: 10.1016/j.jns.2023.122864] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2023] [Revised: 12/03/2023] [Accepted: 12/28/2023] [Indexed: 01/09/2024]
Abstract
Congenital myopathy with tremor (MYOTREM) is a recently described disorder characterized by mild myopathy and a postural and intention tremor present since early infancy. MYOTREM is associated with pathogenic variants in MYBPC1 which encodes slow myosin-binding protein C, a sarcomere protein with regulatory and structural roles. Here, we describe a family with three generations of variably affected members exhibiting a novel variant in MYBPC1 (c.656 T > C, p.Leu219Pro). Among the unique features of affected family members is the persistence of tremor in sleep. We also present the first muscle magnetic resonance images for this disorder, and report muscle atrophy and fatty infiltration.
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Affiliation(s)
- Heather Leduc-Pessah
- Department of Pediatrics, Neurology, Children's Hospital of Eastern Ontario, Ottawa, ON, Canada.
| | - Ian C Smith
- Ottawa Hospital Research Institute, Ottawa, ON, Canada
| | - Kristin D Kernohan
- Department of Genetics, Children's Hospital of Eastern Ontario, Ottawa, ON, Canada; Newborn Screening, Children's Hospital of Eastern Ontario, Ottawa, ON, Canada
| | - Marcos Sampaio
- Department of Radiology, The Ottawa Hospital, Ottawa, ON, Canada
| | - Gerd Melkus
- Department of Radiology, The Ottawa Hospital, Ottawa, ON, Canada
| | - Lauren Strasser
- Department of Pediatrics, Neurology, Children's Hospital of Eastern Ontario, Ottawa, ON, Canada
| | - Caitlin Chisholm
- Department of Genetics, Children's Hospital of Eastern Ontario, Ottawa, ON, Canada
| | - Lijia Huang
- Department of Genetics, Children's Hospital of Eastern Ontario, Ottawa, ON, Canada
| | - Ilana Hanes
- Department of Pediatrics, Neurology, Children's Hospital of Eastern Ontario, Ottawa, ON, Canada
| | - My-An Tran
- Department of Pediatrics, Neurology, Children's Hospital of Eastern Ontario, Ottawa, ON, Canada
| | - Sunita Venkateswaran
- Department of Pediatrics, Neurology, Children's Hospital of Eastern Ontario, Ottawa, ON, Canada
| | - Katherine Muir
- Department of Pediatrics, Neurology, Children's Hospital of Eastern Ontario, Ottawa, ON, Canada
| | | | - Jodi Warman-Chardon
- Ottawa Hospital Research Institute, Ottawa, ON, Canada; Department of Genetics, Children's Hospital of Eastern Ontario, Ottawa, ON, Canada; Department of Medicine, Neurology, The Ottawa Hospital, Ottawa, ON, Canada
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Desai J, Singh E. Intrafamilial Phenotypic Overlap With Distinct Genotypes. Pediatr Neurol 2023; 148:172. [PMID: 37738884 DOI: 10.1016/j.pediatrneurol.2023.08.039] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/23/2023] [Revised: 08/27/2023] [Accepted: 08/29/2023] [Indexed: 09/24/2023]
Affiliation(s)
- Jay Desai
- Division of Neurology, Children's Hospital Los Angeles, Keck School of Medicine, University of Southern California, Los Angeles, California.
| | - Eesha Singh
- University of Southern California, Los Angeles, California
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