Rare association of motor neuron disease and spinocerebellar ataxia type 2 (SCA2): a new case and review of the literature.

We report a rare association of spinocerebellar ataxia and motor neuron disease (MND) in a woman with genetically confirmed SCA2 who subsequently developed a rapidly progressive and fatal form of MND. Considering the rarity of these two neurological conditions, it is interesting to note that the concomitant occurrence of SCA mutations and MND have been previously observed in three cases: in one patient affected by SCA6 and two other cases with SCA2.