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Neuromuscul Disord. 2011 Feb;21(2):102-5. doi: 10.1016/j.nmd.2010.11.002. Epub 2010 Dec 4.

Novel GNE mutations in two phenotypically distinct HIBM2 patients.

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  • 1Department of Neurology and Hope Center for Neurological Disorders, Washington University School of Medicine, 660 S. Euclid Avenue, Saint Louis, MO 63110, USA.


Homozygous mutations in the UDP-N-acetylglucosamine 2-epimerase/N-acetylmannosamine kinase (GNE) gene cause hereditary inclusion body myopathy type 2 (HIBM2). We describe two unrelated American patients with novel GNE mutations. While one patient followed a typical disease course for HIBM2 with an onset at age 25 and rimmed vacuole pathology on muscle biopsy, the second patient had several features atypical for HIBM2. This patient's onset was at age 55, included distal weakness, quadriceps sparing and respiratory insufficiency. His muscle biopsy showed prominent necrosis without rimmed vacuoles. This study expands the phenotype and illustrates the clinical spectrum of HIBM2 identified in a U.S. based neuromuscular clinic.

Copyright © 2010 Elsevier B.V. All rights reserved.

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