New Clinical Phenotype in a Child Presenting With an FHL1 Mutation

Area of Science:

• Genetics
• Molecular Biology
• Neuromuscular Disorders

Background:

• The FHL1 gene encodes four-and-a-half LIM domain protein 1, crucial for muscle structure and function.
• Pathogenic FHL1 variants are linked to a spectrum of myopathies, including Emery-Dreifuss muscular dystrophy and hypertrophic cardiomyopathy.

Purpose of the Study:

• To report a novel FHL1 gene mutation.
• To describe a new clinical phenotype associated with FHL1-related disorders.

Main Methods:

• Clinical evaluation of a 6-year-old boy with neuromuscular symptoms.
• Genetic analysis to identify mutations in the FHL1 gene.

Main Results:

• A novel FHL1 gene mutation was identified in the patient.
• The patient presented with a unique phenotype of progressive stiffness, joint contractures, and mild proximal weakness since birth.

Conclusions:

• This case expands the known clinical spectrum of FHL1-related disorders.
• The novel mutation and associated phenotype highlight the diverse roles of FHL1 in muscle health.