| Clinical | Radiography | Ultrasound |
Synovitis | Swelling of the peri-articular soft parts | Increased local density and erasure of some greasy lines | Hypoechogenic synovial thickening, poorly compressible and vascularized in doppler power. The power Doppler allows to grade the increasing activity of this synovitis in stage 1, 2 and 3. In case of hypoechogenic synovial thickening without doppler flow, the term inactive synovitis in doppler power is preferred |
Erosion | - | Rupture of the bony cortical leaving in place a gap | Net irregularity or interruption of the cortical |
Tenosynovitis | Inflammatory involvement of the synovial sheaths of the tendons | Increased local density and erasure of some greasy lines | Liquid effusion, anechogenic within a tendon sheath, hypoechogenic synovial proliferation or a combination of both |
Joint pinching | - | Overall thinning of articular cartilage | Overall thinning of articular cartilage |
Joint deformation | Disorganization of joint structure | Disorganization of joint structure | Disorganization of joint structure |
Demineralization in strips | - | Density anomaly characterized by a disparition of at least 30% of the calcium contained in the bone and translated by a radio-transparency. |
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