Type 1 ataxia with oculomotor apraxia with aprataxin gene mutations in two American children.

Ataxia and oculomotor apraxia are seen in ataxia-telangiectasia, type 1 ataxia with oculomotor apraxia, and type 2 ataxia with oculomotor apraxia; however, only type 1 ataxia with oculomotor apraxia is associated with aprataxin gene mutation. We report two American children, a sister and a brother, with type 1 ataxia with oculomotor apraxia and aprataxin gene mutations and briefly review type 1 ataxia with oculomotor apraxia.