Figure 1From: Joint and tendon subclinical involvement suggestive of gouty arthritis in asymptomatic hyperuricemia: an ultrasound controlled studyThe double contour sign. Hyperechoic enhancement of the chondrosynovial interface secondary to the monosodium urate crystal deposition. (A) Transversal scan of the femoral cartilage surface. (B) Longitudinal view of the plantar aspect in the first metatarsal-phalangeal joint.Back to article page