[Organic personality disorder as a form of presentation of Huntington's disease].

The psychiatric manifestations of certain neurological diseases frequently are unfamiliar to psychiatrists, which often makes it difficult to select the appropriate therapeutic approach. The clinical case presented exemplifies a case of Huntington disease (HD) which debut with insidious psychiatric symptoms. The most frequent psychiatric presentations in HD are affective and psychotic; however, our case would be better defined as organic personality disorder. This diagnosis in the context of HD is uncommon in the literature.