LRP12 and oculopharyngodistal myopathy: OPDM is an autosomal dominant or autosomal recessive disorder caused by an abnormal expansion of CGG repeats in the LRP12, GIPC1, NOTCH2NLC, and RILPL1 genes on 8q22.3, 19p13.12, 1q21.2, and 12q24.31, respectively.