Molecular syndromology · 2023
Co-Occurrence of Myotonic Dystrophy Type 1 and Limb-Girdle Muscular Dystrophy Type 2B: A Case Report.
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Hauschild Lucas Augusto, Seixas Maia da Silva Taciana, Winckler Pablo Brea, Moreira Cardoso-Júnior Laércio, Saute Jonas Alex Morales, Donis Karina Carvalho
Аннотация
INTRODUCTION: Myotonic dystrophy type 1 (DM1) is an autosomal dominant neuromuscular disease whose pattern of weakness is predominantly distal. Limb-girdle muscular dystrophy type 2B/R2-dysferlin-related (LGMD2B/R2) is another neuromuscular disease, which presents an autosomal recessive inheritance and is marked by proximal muscle weakness. Even if uncommon, comorbid inherited pathologies must be considered in cases of atypical presentations, especially in those with family history of consanguinity.
CASE PRESENTATION: Herein, we report the unique case of a patient diagnosed with both DM1 and LGMD2B/R2: a 38-year-old woman in follow-up of DM1 in a neuromuscular disease service presenting prominent proximal weakness. The patient's parents were consanguineous, and creatine kinase levels were elevated. A multi-gene panel test was performed and revealed the diagnosis of LGMD2B/R2.
CONCLUSION: Genetic diseases with atypical presentations should raise the possibility of a second disorder, prompting an appropriate investigation. Overlooking a second diagnosis can implicate in not offering adequate genetic counseling, support, or specific treatment.
CASE PRESENTATION: Herein, we report the unique case of a patient diagnosed with both DM1 and LGMD2B/R2: a 38-year-old woman in follow-up of DM1 in a neuromuscular disease service presenting prominent proximal weakness. The patient's parents were consanguineous, and creatine kinase levels were elevated. A multi-gene panel test was performed and revealed the diagnosis of LGMD2B/R2.
CONCLUSION: Genetic diseases with atypical presentations should raise the possibility of a second disorder, prompting an appropriate investigation. Overlooking a second diagnosis can implicate in not offering adequate genetic counseling, support, or specific treatment.