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Am J Med Genet A. 2008 Jul 15;146A(14):1832-41. doi: 10.1002/ajmg.a.32370.

Native American myopathy: congenital myopathy with cleft palate, skeletal anomalies, and susceptibility to malignant hyperthermia.

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Curriculum in Genetics and Molecular Biology, University of North Carolina, Chapel Hill, North Carolina, USA.


Native American myopathy (NAM) [OMIM 255995], a putative autosomal recessive disorder, was first reported in the Lumbee Indians of North Carolina. NAM features include congenital weakness and arthrogryposis, cleft palate, ptosis, short stature, kyphoscoliosis, talipes deformities, and susceptibility to malignant hyperthermia (MH) provoked by anesthesia. This report documents the phenotypic complexity and natural history of this rare congenital disorder in fourteen individuals with NAM. Findings include a previously unreported 36% mortality by age 18. Based on this study, our conservative estimate for prevalence of NAM within the Lumbee population is approximately 2:10,000; however, birth incidence remains unknown.

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