Neurologic conditions presenting as psychiatric disorders.

Neurologic disease can present as a psychiatric disorder. Understanding underlying neuroanatomic function helps physicians to localize defects and search for treatable neurologic conditions. Neurologic conditions such as Huntington's chorea, Wilson's disease, Gille de la Tourette syndrome, brain tumors, encephalitis and meningitis, neurodegenerative conditions and metabolic or toxic conditions can have psychiatric manifestations.