Journal
ACTA PAEDIATRICA
Volume -, Issue -, Pages -Publisher
WILEY
DOI: 10.1111/apa.16945
Keywords
congenital myasthenic syndromes; diagnostic delay; paediatrics; symptoms
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This study aimed to identify common symptoms of congenital myasthenic syndromes (CMS) in children and their manifestation, in order to aid diagnosis and early intervention. The most common symptoms observed in patients were proximal muscle weakness, ptosis, clumsy gait, difficulty eating solid foods, and recurrent respiratory tract infections. These symptoms often co-occurred and had a fluctuating character, which could be aggravated by infections or fatigue.
Aim: Congenital myasthenic syndromes (CMS) are a rare and diverse group of treatable neuromuscular transmission disorders. Diagnosis is often substantially delayed. This study aimed to identify common symptoms of CMS in children and their manifestation to aid diagnosis and early intervention.Methods: We performed a retrospective cohort study, including 18 children (median age 13 years, range 9 years 5 months-18 years 0 month) with CMS. Data on CMS symptoms and their manifestation were extracted from patients' charts and supplemented with parental telephone interviews. Descriptive analyses were used to identify common symptoms.Results: A median diagnostic delay of 4 years and 7 months (interquartile range: 51 months) was observed. Proximal muscle weakness (100%), ptosis (89%), clumsy gait (82%), difficulty eating solid foods (78%) and recurrent respiratory tract infections (72%) were most common in these patients. Symptoms mostly co-occurred and frequently had a fluctuating character, aggravated by infections or fatigue.Conclusion: Early referral to diagnose CMS is crucial to enable timely initiation of treatment. Heightened attention to a combination of symptoms related to muscle weakness, rather than individual symptoms, should support paediatricians in flagging these neuromuscular disorders. Medical history taking should be tailored to parents' perceptions, asking questions about recognisable symptoms of muscle weakness.
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