Gout

In patients with long-standing untreated gout, monosodium urate crystal deposition on the surface of the articular cartilage results in hypere-choic enhancement of the superficial margin, which can range from the homogeneous thickening of the synovial space-cartilage interface, to areas of focal deposition (Fig. 4.6 a,b).

Due to the deposition of monosodium urate crystals, reflectivity of the superficial margin is no longer dependant upon the angle of insonation, and a panoramic visualization of the full synovial space-cartilage interface can be easily ascertained, and the amount of crystal deposition estimated. The adherence of monosodium urate crystals to the superficial margin of the articular cartilage can be confirmed by dynamic assessment using active and passive movement of the joint.

Carcinoma Mamario Espiculado Ecografia

Chronic gout.Transverse (a) and longitudinal (b) supra-patellar views of the knee demonstrate diffuse urate crystal deposition (arrowheads) on the cartilage surface of the lateral femoral condyle (f).p = upper pole of the patella

Chronic gout.Transverse (a) and longitudinal (b) supra-patellar views of the knee demonstrate diffuse urate crystal deposition (arrowheads) on the cartilage surface of the lateral femoral condyle (f).p = upper pole of the patella

Pyrophosphate arthropathy.Transverse para-patellar view of the knee depicts minimal aggregates of pyrophosphate crystals within the femoral cartilage. f = medial femoral condyle; p = patella

Pyrophosphate arthropathy.Transverse para-patellar view of the knee depicts minimal aggregates of pyrophosphate crystals within the femoral cartilage. f = medial femoral condyle; p = patella

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