Clinical characteristics and risk factors of ulceration over tophi in patients with gout.

Gout patients with ulceration(s) over tophi present several different aspects of clinical characteristics compared with those without ulceration. The ulcerations are most commonly seen in feet and they are mainly categorized as stages I and II. Glucocorticoid overuse, prolonged duration with tophi and greater numbers of tophi are risk factors for ulceration over tophi.