Proximal Myotonic Myopathy: Report on Italian Families and Literature Review

Abstract

Abstract

Despite the more recent genetic classification of the novel myotonic dystrophies into at least two distinct myotome dystrophy (DM) loci (DM1, DM2/PROMM/PDM), the clinical characteristics of these dominant myotonic syndromes often blur. The multisystemic nature of these disorders leads to a spectrum of symptoms and signs th.it emphasize the similarities and differences between these diseases. This review focuses en the clinical, laboratory, and genetic findings in 3q-linked and unlinked Italian families with proximal myotonic myopathy (PROMM). From a neuromuscular and cardiac point of view, we present follow-up data fom 25 patients studied serially over a 6-year period. We also present data on central nervous system involvement following neuropsychologic arid neuroimaging studies in this same period of time.