N. Van Alfen et al., Intermediate CAG repeat lengths (53,54) for MJD/SCA3 are associated with an abnormal phenotype, ANN NEUROL, 49(6), 2001, pp. 805-807
We report on a Dutch family in which 4 members in 2 generations have interm
ediate repeat lengths (53 and 54) for Machado-Joseph Disease/ Spinocerebell
ar Ataxia (MJD/SCA3). All but the youngest have a restless legs syndrome wi
th fasciculations and a sensorimotor axonal polyneuropathy. Central neurolo
gical abnormalities are only present in 2. This family shows that intermedi
ate repeat lengths can be pathogenic and may predispose for restless legs a
nd peripheral nerve disorder.