Huntingtons Disease: Diagnosis
In addition to conducting a physical examination and a thorough review of the patient’s personal and family medical history, there are a series of tests your doctor can request to obtain a definitive diagnosis of Huntington’s disease.

Since HD is a hereditary disorder, DNA analysis of blood can reveal whether the distinct mutation for Huntington’s disease exists in gene IT-15.

A computed tomography (CT) scan of the head may show atrophy of brain tissue and enlargement of brain ventricles. This painless diagnostic procedure produces computer-generated images of the brain's internal structures. An MRI scan of the head and a PET (isotope) scan of the brain may also reveal traces of Huntington's disease.