Multiple Gouty Tophi with Bone Erosion and Destruction: A Report of an Early-onset Case in an Obese Patient.

A 27 year-old severely obese man (BMI, 35.1) had hyperuricemia and multiple gouty tophi with bone erosion and destruction, resulting in gait disturbance for 6 years after the early onset of gout at 21 years of age. His hyperuricemia was associated with hyperinsulinemia in obesity and a genetic variant of the ABCG2 gene. In addition, multiple gouty tophi with bone erosion and destruction might have been caused by hypoadiponectinemia and the elevation of the patient' s pro-inflammatory cytokine (IL-1β) level with the accumulation of visceral fat. In this case, bone and Ga-67 scintigraphy were useful for detecting the location and magnitude of gouty tophi.