[Psychiatric symptoms of Huntington's disease].

Huntington's disease (HD) is an autosomal dominant inherited disease, which leads to motor, cognitive and psychiatric symptoms. The diagnosis can be confirmed by genetic testing for extended CAG repeats in the Huntingtin gene. Mental and behavioral symptoms are common in HD and can appear several years before the onset of motor symptoms. The psychiatric symptoms include apathy, depression, anxiety, obsessive-compulsive symptoms and, in some cases, psychoses and aggression. These are currently restricted to symptomatic treatment as disease-modifying treatment approaches are still under investigation. The current clinical practice is based on expert opinions as well as experience with the treatment of similar symptoms in other neurological and mental health diseases. This article provides an overview of the complex psychiatric manifestations of HD, the diagnostic options and the established pharmacological and nonpharmacological treatment approaches.