Gouty arthritis in Australian Aboriginals: more common than previously suspected

To the Editor: A recent review suggests that acute rheumatic fever, osteoarthritis and systemic lupus erythematosus account for most rheumatic disease in Australian Aboriginals, and comments on the rarity of gout.1 Although the increased prevalence of hyperuricaemia in Aboriginals compared with non-Aboriginals has been described,2 clinical attacks of gout in Aboriginals have so far been extremely rare.1,3 This is in sharp contrast to various Polynesian and other indigenous populations, including Mäori in New Zealand, Filipinos in Hawaii and Alaska, Chamorros and Carolinians in the Marianas Islands, and Taiwanese aborigines. In these populations, increased prevalences of both hyperuricaemia and gout have been documented.4,5

In an extensive literature search, we found only one report of confirmed acute gouty arthritis in an Australian Aboriginal with normal renal function,3 although there have been several Aboriginals in the “Top End” with crystal-confirmed gout in association with chronic renal impairment.1

Between January 2001 and April 2004, we identified seven new cases of acute gouty arthritis in Aboriginals (Box), confirmed by joint aspiration revealing monosodium urate monohydrate crystals. Three of these patients had confirmed acute gouty arthritis without renal impairment. This series also includes the first reported cases of gouty arthritis in Aboriginal women.

Our findings suggest that the prevalence of acute gouty arthritis in Australian Aboriginals is much higher than previously reported. Discussion with physicians at Alice Springs Hospital revealed that they too have encountered gouty arthritis in Aboriginals, but whether this was confirmed by joint aspiration is not known. It appears that gout has been misdiagnosed or under-reported, or both. Further epidemiological studies should be undertaken to confirm this hypothesis, and we must have a higher index of suspicion for gout when an Aboriginal patient presents with an arthropathy, as gout is a potentially disabling and yet easily treatable condition.