Genetic Evaluation of a Consanguineous Family with Suspected Hereditary Neuromuscular Disorder: A Whole Exome Sequencing-Based Study

Consanguinity is a well-recognized factor that increases the likelihood of autosomal recessive genetic disorders due to shared ancestry and the inheritance of identical pathogenic variants [1]. This study presents a comprehensive clinical and molecular evaluation of a young consanguineous couple with a significant paternal family history of progressive neuromuscular symptoms and associated malignancies. The proband, a 26-year-old male, underwent Whole Exome Sequencing (WES) to identify potential pathogenic variants contributing to the familial phenotype [2]. Despite a strong clinical suspicion of a hereditary neuromuscular disorder, WES did not reveal any causative variants directly explaining the observed phenotype. However, incidental heterozygous likely pathogenic variants were identified in the PYGL and TMC1 genes [3]. These variants are associated with autosomal recessive conditions—glycogen storage disease type VI and hereditary hearing loss, respectively—and thus represent carrier states without clear clinical correlation to the presenting condition. The absence of a definitive molecular diagnosis highlights the limitations of WES in detecting certain variant types, including non-coding, structural, or regulatory alterations. These findings underscore the complexity of genotype–phenotype correlations in genetically heterogeneous disorders. The study emphasizes the importance of integrating detailed clinical evaluation with genomic data, along with genetic counseling, extended family testing, and multidisciplinary assessment [4]. Future approaches incorporating whole genome sequencing and functional studies may improve diagnostic yield in unresolved hereditary neuromuscular conditions.