Previously reported evidence suggested that 4q35.2 genes FRG1, 4q35.1 gene ANT1 (SLC25A4), and the 5q31 gene PITX1, which were represented on our microarrays, might be involved in FSHD [6,17-22]. The gene discussed is PITX1; the disease is facioscapulohumeral muscular dystrophy.