Abstract: Objective To investigate the diagnostic value of the first metatarsophalangeal joint(MPJ1)ultrasonography in gout. Methods MPJ1-5 of 50 patients with gout, 40 with asymptomatic hyperuricemia(AH) and 40 with non-gouty arthritis(NGA) were examined by color Doppler ultrasonography. The ultrasonic manifestations were compared among three groups. Results In gout group, the lesions were more common in MPJ1 than in MPJ2-5;microcrystal detection of ultrasonography with firefly imaging in MPJ1 was superior to that of single ultrasonography(P<0.01). The positive rates of microcrystals, bilateral signs and tophi in MPJ1 were higher in gout group compared with AH and NGA groups(P<0.01). Conclusion Ultrasound examination of MPJ1 can be used as the preferred joint for gout diagnosis.
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