(Ebook) Hankey's Clinical Neurology, Second Edition by Giovanni Meola Affiliation: Dipartimento di Neurologia, Istituto Policlinico San Donato, Università di Milano, Via Morandi, 30, 20097 San Donato Milanese, Milano, Italy ISBN 9781840761931, 9781840766509, 1840761938, 1840766506

(Ebook) Hankey's Clinical Neurology, Second Edition by Giovanni Meola Affiliation: Dipartimento di Neurologia, Istituto Policlinico San Donato, Università di Milano, Via Morandi, 30, 20097 San Donato Milanese, Milano, Italy ISBN 9781840761931, 9781840766509, 1840761938, 1840766506

This review of myotonic dystrophies primarily concentrates on the clinical and genetic findings that can distinguish a novel form of myotonic dystrophy, myotonic dystrophy type 2 (DM2); proximal myotonic myopathy (PROMM); and proximal myotonic dystrophy (PDM) from myotonic dystrophy type 1 (DM1). The multisystemic nature of these disorders leads to a spectrum of symptoms and signs. Careful clinical evaluation of patients with DM2/PROMM shows that the similarities among the multisystemic myotonic disorders outweigh the differences. An important point in the comparison of the phenotypes of DM1 and DM2/PROMM is that no severe congenital type of DM2/PROMM has yet been described. Genetic linkage analyses show that myotonic dystrophies can be divided into three types: the conventional Steinert type linked to chromosome 19q13.3 (DM1); DM2/PROMM and PDM linked to chromosome 3q21.3; and families not linked to either chromosomal site. Although the diagnosis may be clinically suspected, it depends on DNA analysis. © 2000 John Wiley & Sons, Inc. Muscle Nerve 23: 1789-1799, 2000
Abstract: This review of myotonic dystrophies primarily concentrates on the clinical and genetic findings that can distinguish a novel form of myotonic dystrophy, myotonic dystrophy type 2 (DM2); proximal myotonic myopathy (PROMM); and proximal myotonic dystrophy (PDM) from myotonic dystrophy type 1 (DM1). The multisystemic nature of these disorders leads to a spectrum of symptoms and signs. Careful clinical evaluation of patients with DM2/PROMM shows that the similarities among the multisystemic myotonic disorders outweigh the differences. An important point in the comparison of the phenotypes of DM1 and DM2/PROMM is that no severe congenital type of DM2/PROMM has yet been described. Genetic linkage analyses show that myotonic dystrophies can be divided into three types: the conventional Steinert type linked to chromosome 19q13.3 (DM1); DM2/PROMM and PDM linked to chromosome 3q21.3; and families not linked to either chromosomal site. Although the diagnosis may be clinically suspected, it depends on DNA analysis. © 2000 John Wiley & Sons, Inc. Muscle Nerve 23: 1789-1799, 2000