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Review Article : NF1 Mutations and Molecular Testing

Departments of Molecular Genetics and Microbiology, and Pediatrics (Division of Genetics), University of Florida College of Medicine, Gainesville, FL

Lauren Fishbein, BA

Departments of Molecular Genetics and Microbiology, and Pediatrics (Division of Genetics), University of Florida College of Medicine, Gainesville, FL

Margaret R. Wallace, PhD

Departments of Molecular Genetics and Microbiology, and Pediatrics (Division of Genetics), University of Florida College of Medicine, Gainesville, FL

Neurofibromatosis 1 is a progressive autosomal dominant condition caused by mutations in the NFI gene on chromosome 17. The condition shows clinical variable expressivity, with varying features even between family members who share the same mutation. Furthermore, it is impossible to precisely predict the severity and course of the condition, a source of frustration for families and physicians. Neurofibromatosis 1 is also heterogeneous at the mutation level, with more than 300 independent mutations having been reported in this gene. The mutation data have accumulated slowly owing to the variability of the mutation types and the size and complexity of the gene. This is also reflected in the lack of a simple, inexpensive, highly accurate DNA-based test for neurofibromatosis 1 at present. This article reviews current NF1 mutation spectrum and testing, discussing and illustrating mutation mechanisms and pathogenetic effects, as well as factors affecting DNA testing and interpretation/diagnosis. (J Child Neurol 2002;17:555-561).

Journal of Child Neurology, Vol. 17, No. 8, 555-561 (2002)
DOI: 10.1177/088307380201700803


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