Neurogenetics in Argentina: diagnostic yield in a personalized research based clinic

Genet Res (Camb). 2015;97:e10. doi: 10.1017/s0016672315000087.

Abstract

As a whole neurogenetic diseases are a common group of neurological disorders. However, the recognitionand molecular diagnosis of these disorders is not always straightforward. Besides, there is a paucity of informationregarding the diagnostic yield that specialized neurogenetic clinics could obtain. We performed a prospective,observational, analytical study of the patients seen in a neurogenetic clinic at a tertiary medicalcentre to assess the diagnostic yield of a comprehensive diagnostic evaluation that included a personalizedclinical assessment along with traditional and next-generation sequencing diagnostic tests. We included a cohortof 387 patients from May 2008 to June 2014. For sub-group analysis we selected a sample of patientswhose main complaint was the presence of progressive ataxia, to whom we applied a systematic moleculardiagnostic algorithm. Overall, a diagnostic mutation was identified in 27·4% of our cohort. However, if weonly considered those patients where a molecular test could be performed, the success rate rises to 45%. Weobtained diagnostic yields of 23·5 and 57·5% in the global group of ataxic patients and in the subset of ataxicpatients with a positive family history, respectively. Thus, about a third of patients evaluated in a neurogeneticclinic could be successfully diagnosed.

Publication types

  • Observational Study
  • Research Support, Non-U.S. Gov't

MeSH terms

  • Adolescent
  • Adult
  • Aged
  • Argentina
  • Ataxia / diagnosis
  • Ataxia / genetics
  • Child
  • DNA Mutational Analysis
  • Family Health
  • Female
  • Genetic Predisposition to Disease / genetics
  • High-Throughput Nucleotide Sequencing / methods*
  • Humans
  • Male
  • Middle Aged
  • Mutation
  • Nervous System Diseases / diagnosis*
  • Nervous System Diseases / genetics*
  • Precision Medicine / methods*
  • Prospective Studies
  • Reproducibility of Results
  • Sensitivity and Specificity
  • Tertiary Care Centers
  • Young Adult