Which neurocognitive disorder is tied to an established diagnosis of Huntington's Disease?

The correct response identifies Major or Mild Neurocognitive Disorder due to Huntington's Disease as directly linked to an established diagnosis of Huntington's Disease. This disorder is characterized by progressive cognitive decline and is specifically associated with neurodegeneration resulting from Huntington's Disease.

In Huntington's Disease, the cognitive decline affects various domains, including executive function, memory, and changes in personality, which align with the criteria set forth for major or mild neurocognitive disorders. The diagnosis is grounded in the understanding that the cognitive impairments arise secondary to the neurological degeneration intrinsic to Huntington's Disease itself.

Other options, while involving neurocognitive disorders, do not correlate directly with Huntington's Disease. Major or Mild NCD due to Parkinson's Disease relates to another distinct neurodegenerative condition, while neurocognitive disorders due to traumatic brain injury or unspecified neurocognitive disorders do not have the same direct causal link to Huntington's. Therefore, recognizing the specific relationship between the neurocognitive disorder and its originating disease is essential in arriving at the correct answer.