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Pediatrics 2018-Apr

Unusual Presentations of Dystrophinopathies in Childhood.

Samo registrirani uporabniki lahko prevajajo članke
Prijava / prijava
Povezava se shrani v odložišče
Nicholas M Allen
Alice Ewer
Vasiliki Nakou
Ele Konstantoulaki
Elizabeth Wraige
Vasantha Gowda
Heinz Jungbluth

Ključne besede

Povzetek

X-linked recessive mutations in the dystrophin gene are one of the most common causes of inherited neuromuscular disorders in humans. Duchenne muscular dystrophy, the most common phenotype, and Becker muscular dystrophy are often recognizable by certain clinical features; however, less frequent presentations require a higher degree of suspicion. In this article, we describe a series of 6 children (4 boys, 2 girls) referred to a tertiary pediatric neuromuscular clinic for isolated elevated creatine kinase levels (range: 720-7000 IU/L) identified on initial assessment for otherwise unexplained transaminase elevations (n = 2), a social communication disorder (n = 3), and exertional myalgia and/or rhabdomyolysis (n = 1). There was no preceding family history of neuromuscular disease. One boy had an additional history of severe cerebral palsy and cyclical vomiting, and 1 girl had a history of maternal hepatitis C. There was no significant weakness at presentation, and the majority remained stable over a prolonged period of follow-up (age range at last follow-up: 9-16 years). All 6 children were found to carry dystrophin gene mutations resulting in milder phenotypes. This series highlights that dystrophinopathies may not uncommonly present with features distinct from the classic Duchenne muscular dystrophy and Becker muscular dystrophy phenotypes in both boys and girls. Pediatricians should be aware of such atypical presentations to initiate a timely and adequate diagnostic process. Establishing the correct genetic diagnosis of a dystrophinopathy is important to allow appropriate genetic counseling, to implement relevant surveillance and management strategies, and to avoid unnecessary investigations in search of an incorrect alternative diagnosis.

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