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Acta Neurológica Colombiana

Print version ISSN 0120-8748


VALENCIA, Hernán Darío et al. Clinical characteristics of patients under 18 years-old with spinal muscular atrophy in Medellín, 2008 - 2013. Acta Neurol Colomb. [online]. 2016, vol.32, n.1, pp.9-17. ISSN 0120-8748.

Introduction: Spinal muscular atrophy (SMA) is a degenerative disease that affects motor neurons in the anterior horn of the spinal cord, it is manifested by progressive muscle weakness predominantly proximal, hypotonia andosteotendinous arreflexia, the cause is a mutation in neuronal survival gene SMN1 Objective: Establish the clinical, electromyographics and genetics characteristics of patients younger than 18 years with spinal muscular atrophy in the Medellín city, during the period 2008-2013. Materials and methods: A retrospective study of patients with SMA seen in the Hospital Universitario San Vicente Foundation and private center of Neuro- pediatric of Medellín during the period 2008-2013 was performed. Data from 29 patientes were available, were reviewed clinical feature, diagnostic aids and treatments practiced. Results: SMA type II resulted the most frequent clinical presentation (62%) followed by SMA type I (24.13%), the main manifestations were hypotonia (100 %), muscle weakness (93.1%) and osteotendinous arreflexia (82.8%), tongue fasciculations occurred in 48.3% of patients. The molecular test was performed in 6 patients and in all the deletion of exon 7 of the SMN1 gene was found. Conclusion: spinal muscular atrophy is a degenerative and progressive disease according to their clinical classification. It should be suspected when there are motoneuronal syndrome and lingual twitches. Molecular diagnosis is the most accurate to confirm the disease.

Keywords : Spinal Muscular Atrophy; Hypotonia; Werdnig-Hoffman; SMN1 gene.

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