Myophosphorylase deficiency: an unusually severe form with myoglobinuria.

Kristjánsson, K; Tsujino, S; DiMauro, S · J Pediatr · 1994

case_report · Level V

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Abstract

Myophosphorylase deficiency (McArdle disease) is characterized by exercise intolerance that usually starts in childhood. Severe cramps and myoglobinuria are rarely problems in children. We describe an 8-year-old boy with exercise-induced myoglobinuria; he was homozygous for the mutation most commonly encountered in patients with typical McArdle disease.

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