This 1991 world survey synthesized over 150 epidemiologic studies to estimate the population frequencies of major inherited neuromuscular diseases. It covers Duchenne, Becker, facioscapulohumeral, and limb girdle muscular dystrophies, myotonic dystrophy, spinal muscular atrophies, and hereditary motor and sensory neuropathies. The central question: how common are these diseases, and what is the overall burden on the population?
Orthopedic surgeons encounter inherited neuromuscular diseases more often than the rarity of any single diagnosis suggests. With a combined prevalence exceeding 1 in 3500, these conditions appear regularly in pediatric and adult practice — scoliosis in Duchenne, foot deformity in Charcot-Marie-Tooth, contractures in limb girdle dystrophy.
When a child presents with proximal muscle weakness, delayed walking, or unexplained scoliosis, Duchenne muscular dystrophy must be on your differential. At 1 in 3500 male births, it is not rare. An elevated creatine kinase and the absence of deep tendon reflexes in a boy under 5 years should prompt immediate referral.
For Becker muscular dystrophy, recognize that historical prevalence figures underestimate true frequency. Dystrophin assay is now the definitive test, and non-familial isolated cases were systematically missed before molecular diagnostics.
Charcot-Marie-Tooth disease is the most prevalent inherited neuromuscular condition overall. A patient with pes cavus, hammer toes, and distal weakness deserves nerve conduction studies before any foot reconstruction — the underlying neuropathy will affect surgical planning and long-term outcomes.
This 1991 world survey synthesized over 150 epidemiologic studies to estimate the population frequencies of major inherited neuromuscular diseases. It covers Duchenne, Becker, facioscapulohumeral, and limb girdle muscular dystrophies, myotonic dystrophy, spinal muscular atrophies, and hereditary motor and sensory neuropathies. The central question: how common are these diseases, and what is the overall burden on the population?
Orthopedic surgeons encounter inherited neuromuscular diseases more often than the rarity of any single diagnosis suggests. With a combined prevalence exceeding 1 in 3500, these conditions appear regularly in pediatric and adult practice — scoliosis in Duchenne, foot deformity in Charcot-Marie-Tooth, contractures in limb girdle dystrophy.
When a child presents with proximal muscle weakness, delayed walking, or unexplained scoliosis, Duchenne muscular dystrophy must be on your differential. At 1 in 3500 male births, it is not rare. An elevated creatine kinase and the absence of deep tendon reflexes in a boy under 5 years should prompt immediate referral.
For Becker muscular dystrophy, recognize that historical prevalence figures underestimate true frequency. Dystrophin assay is now the definitive test, and non-familial isolated cases were systematically missed before molecular diagnostics.
Charcot-Marie-Tooth disease is the most prevalent inherited neuromuscular condition overall. A patient with pes cavus, hammer toes, and distal weakness deserves nerve conduction studies before any foot reconstruction — the underlying neuropathy will affect surgical planning and long-term outcomes.