Compound heterozygosity for an expanded (GAA) and a (GAAGGA) repeat at FXN locus: from a diagnostic pitfall to potential clues to the pathogenesis of Friedreich ataxia

Massimo Santoro, Alessia Perna, Piergiorgio La Rosa, Sara Petrillo, Fiorella Piemonte, Salvatore Rossi, Vittorio Riso, Tommaso Filippo Nicoletti, Anna Modoni, Maria Grazia Pomponi, Pietro Chiurazzi & Gabriella Silvestri; Neurogenetics (2020). doi:10.1007/s10048-020-00620-7

This report highlights a rare but possible pitfall in FRDA molecular diagnosis, emphasizing the need of further analysis in case of discrepancy between clinical and molecular data.