Huntington's disease and leprosy in a New Guinea Highlander.

Huntington's disease (HD) was observed in a 45-year-old male Melanesian patient from the Eastern Highlands Province of Papua New Guinea. The patient had multiple peripheral nerve palsies as a result of tuberculoid leprosy and had been resident in the leprosy ward of Goroka Base Hospital for over 6 years. During this time his HD had remained undiagnosed. This is the first report of HD in the Highlands of New Guinea.