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J. Irobi, P. De Jonghe and V. Timmerman, “Molecular Genetics of Distal Hereditary Motor Neuropathies,” Human Molecular Genetics, Vol. 13, No. 2, 2004, pp. R195-R202.

has been cited by the following article:

  • TITLE: Course of Atypical Manifestations of a Case of Charcot-Marie-Tooth Disease over 35 Years of Clinical Observation

    AUTHORS: Giuseppe Lanza, Luisa Vinciguerra, Valentina Puglisi, Daniela Modica, Alfio Catalano, Giuseppe Zelante, Riccardo Ricceri, Lorenzo Lupo, Salvatore Giuffrida, Manuela Pennisi

    KEYWORDS: Hereditary Neuropathies; Clinical Overlap; Genetic Analysis; Phenotypic Variability

    JOURNAL NAME: Neuroscience and Medicine, Vol.4 No.3, September 10, 2013

    ABSTRACT: Introduction: Atypical manifestations of peripheral neuropathy are not rare, challenging the differential diagnosis. In the past, the diagnosis of hereditary neuropathy was mainly based on the clinical and electromyographic (EMG) findings and, occasionally, biopsy. Nowadays, the genetic tests allow us to identify more than 40 different genes/loci associated with Charcot-Marie-Tooth (CMT) disease, although some subtypes are clinically indistinguishable. We have followed a patient with a clinical diagnosis of apparent sporadic and atypical CMT and recently diagnosed genetically as distal hereditary motor neuropathy, type V (dHMN-V). Case Report: Thirty-five years ago, a 16 years old patient complained muscular weakness and wasting at the hands small muscles. Sporadic fasciculations were observed whereas deep tendon reflexes and sensation were normal. EMG examination revealed neurogenic muscular denervation in the distribution of C7, C8 and T1 segments bilaterally. Muscular biopsy of the left Biceps Brachii showed rare atrophic fibers and some cellular atypia. The disease has undergone a clinical and EMG progression and diffusion over the years, involving the lower limbs and leading to a bilateral steppage. A more slight diffuse axonal motor neuropathy was also identified in the proband’s son and second cousin. The genetic study found a known missense mutation in BSCL2 gene related to a dHMN-V. Interestingly, there was a remarkable intra-familiar phenotypic variability, especially in the clinical onset and severity. Discussion: Atypical manifestations of hereditary neuropathies often overlap with other conditions. The present case highlights how a comprehensive clinical evaluation and a careful follow-up have led to a correct diagnosis even 35 years later and have allowed to identify other affected family members. The apparent lack of familiarity was probably due to the very soft presentation in the proband’s relatives. Although the genetic study was not available at that time, the first clinical diagnosis was not disavowed. The main differential diagnoses and a brief review of similar reported cases are discussed.