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Am J Med Genet. 1995 Feb 13;55(4):397-401.

Girl with signs of Pelizaeus-Merzbacher disease heterozygous for a mutation in exon 2 of the proteolipid protein gene.

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  • 1Department of Medical and Molecular Genetics, Indiana University School of Medicine, Indianapolis 46202-5251, USA.


We studied a female infant with clinical signs of Pelizaeus-Merzbacher disease (PMD), who has a familial mutation (C41-->T) in exon 2 of the proteolipid protein gene (PLP), and selected relatives. While the carrier mother and grandmother of the proposita currently are neurologically normal and show normal T2 magnetic resonance imaging (MRI) of the brain, the infant has a neurological picture, MRIs, and brain auditory evoked response (BAER) consistent with that diagnosis. The data here presented show that PMD can occur in females carrying a mutation in the PLP gene. Our experience with the MRIs of this patient, her mother and grandmother, and those of a previously reported family [Pratt et al.: Am J Med Genet 38:136-139, 1991] show that molecular genetic analysis and not MRI is the appropriate means for carrier detection.

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