Huntington's chorea is an example of a(n):

Huntington's chorea is classified as a hereditary disease of the central nervous system (CNS) because it is caused by a genetic mutation, specifically in the HTT gene. This condition follows an autosomal dominant inheritance pattern, which means that a single copy of the mutated gene inherited from an affected parent is sufficient to develop the disorder.

As a hereditary disease, Huntington's chorea is characterized by progressive degeneration of nerve cells in the brain, leading to motor dysfunction, cognitive decline, and psychiatric symptoms. Understanding this hereditary aspect is crucial, as it informs both the mode of genetic testing for at-risk individuals and the approach to family counseling regarding potential transmission to offspring.

While Huntington's chorea is a neurological disorder and can be described as such due to its effects on the nervous system, the emphasis on its hereditary nature as the cause makes the classification as a hereditary disease of the CNS most accurate. Autoimmune diseases and metabolic disorders are distinct categories that do not apply in this context since Huntington's chorea does not involve immune system dysfunction or metabolic imbalances.