Early-onset ataxia with cardiomyopathy and retained tendon reflexes maps to the Friedreich's ataxia locus on chromosome 9q

Francisco Palau, Giuseppe De Michele, Juan J. Vilchez, Massimo Pandolfo, Eugènia Monrós, Sergio Cocozza, Patricia Smeyers, José Lopez-Arlandis, Giuseppe Campanella, Stefano Di Donato, Alessandro Filla

Research output: Contribution to journalArticlepeer-review

Abstract

Absence of lower limb tendon reflexes has been considered an essential diagnostic criterion for Friedreich's ataxia (FA). However, preservation of knee and ankle jerks has been reported in a few patients. Linkage analysis to FA locus (FRDA) on chromosome 9q13-21.1 was performed in 11 patients from 6 families with FA phenotype, including cardiomyopathy, but retained reflexes (FARR). A maximal lod score of 3.38 at recombination fraction theta equal to 0.00 was obtained demonstrating that FARR maps to the FRDA locus. These results suggest that FARR is a variant phenotype of FA.

Original languageEnglish
Pages (from-to)359-362
Number of pages4
JournalAnnals of Neurology
Volume37
Issue number3
DOIs
Publication statusPublished - Mar 1995

ASJC Scopus subject areas

  • Neuroscience(all)

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