Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
6041617 | Neuromuscular Disorders | 2014 | 6 Pages |
Abstract
We describe a Hungarian Roma family, originally investigated for autosomal dominant distal muscular atrophy. The mother started toe walking at 3Â years and lost ambulation at age 27. Her three daughters presented with early steppage gait and showed variable progression. Muscle biopsies were nonspecific showing myogenic lesions in the mother and lesions resembling neurogenic atrophy in the two siblings. To identify the causative abnormality whole exome sequencing was performed in two affected girls and their unaffected father, unexpectedly revealing the MYH7 mutation c.4849_4851delAAG (p.K1617del) in both girls, reported to be causative for Laing distal myopathy. Sanger sequencing confirmed the mutation in the affected mother and third affected daughter. In line with variable severity in Laing distal myopathy our patients presented a more severe phenotype. Our case is the first demonstration of Laing distal myopathy in the Roma and the successful use of whole exome sequencing in obtaining a definitive diagnosis in ambiguous cases.
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Authors
Katalin Komlósi, Kinga Hadzsiev, Lutz Garbes, Lilian A. MartÃnez Carrera, Endre Pál, Jóhann Haukur Sigurðsson, Olafur Magnusson, Béla Melegh, Brunhilde Wirth,