Parkinsonism is a movement disorder, although not always due to Parkinson disease. There are many neurological disorders that present with similar movement abnormalities. Although the differential diagnosis is mostly clinical between these different disorders, imaging biomarkers play a role and also have the potential to track disease progression.
Huntington’s disease is an autosomal dominant disorder. If the parent carries the genetic mutation, they have a 50% chance of passing it onto their children.