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Fig. 1C. —Carpal tunnel syndrome induced by tophaceous gout in 69-year-old man. Axial T1-weighted spin-echo MR image (TR/TE, 550/19) (A), axial T2-weighted fat-suppressed fast spin-echo MR image (TR/effective TE, 3400/80) (B), and gadolinium-enhanced T1-weighted spin-echo MR image (TR/TE, 466/19) (C) show gouty tophi deposition in carpal tunnel floor (solid straight arrows), flexor tendons (arrowheads), extensor tendons and sheaths (curved arrows), and carpal bones (open arrows). Depositions are seen as areas of intermediate signal intensity with foci of low signal intensity on A and B. On C, note enhancement of tophi except those in carpal tunnel floor.