A Novel Mutation of the GNE Gene in Distal Myopathy with Rimmed Vacuoles: A Case with Inflammation.

Abstract

Distal myopathy with rimmed vacuoles (DMRV) is an autosomal recessive or sporadic early adult-onset myopathy caused by mutations in the UDP-N-acetylglucosamine 2-epimerase and N-acetylmannosamine kinase (GNE) gene. Characteristic pathologic features of DMRV are rimmed vacuoles on muscle biopsy and tubulofilamentous inclusion in ultrastructural study. Presence of inflammation in DMRV is unusual. We report a sporadic case of DMRV in a 40-year-old Thai man who presented with slowly progressive distal muscle weakness. Gene analysis revealed a compound heterozygous mutation of the GNE gene including a novel mutation c.1057A>G (p.K353E) and a known mutation c.2086G>A (p.V696M). The latter is the most common mutation in Thai DMRV patients. The muscle pathology was compatible with DMRV except for focal inflammation.

• Authors: Jantima Tanboon, Kanjana Rongsa, Manop Pithukpakorn, Kanokwan Boonyapisit, Chanin Limwongse, Tumtip Sangruchi
• Journal: Case reports in neurology (Case Rep Neurol) Vol. 6 Issue 1 Pg. 55-9 (Jan 2014) ISSN: 1662-680X [Print] Switzerland
• PMID: 24707269 (Publication Type: Case Reports)