Other Heredodegenerative Diseases.

Dentato-rubro-pallido-luysian atrophy (DRPLA) is a rare familial disorder comprising degeneration of the cerebellar efferent system and of the pallido-luysian tracts. Ataxic choreoathetoid, pseudo-Huntington, and myoclonic epilepsy forms of this syndrome have been described. The disorder begins between 7 and 20 years of age. [ABSTRACT FROM AUTHOR]