Synovial osteochronomatosis is a relatively common disorder caused by a metaplasia of the synovium, resulting deposition of foci of cartilage in the joint. Most of the time , these cartilaginous deposits calcify.
It is most commonly seen in the knee, hip, and elbow joints.
Up to 3o%, the cartilaginous deposits do not calcify, in these cases , all that is seen on the radiograph is a joint effusion, unless erosions or joint destruction occur.
The calcification begin in the synovium and then shed into the joint, where they can cuase symptoms of free fragments or joint mice. They then embed in the synovium and not to be free in the joint after a while.
It is usually necessary to perform a complete synovectomy to relieve the symptoms.
Differential diagnosis:
1-chondrosarcoma, histologivally for the calcified type.
2-pigmented villonodular synovitis for non calcified type.
It is most commonly seen in the knee, hip, and elbow joints.
Up to 3o%, the cartilaginous deposits do not calcify, in these cases , all that is seen on the radiograph is a joint effusion, unless erosions or joint destruction occur.
The calcification begin in the synovium and then shed into the joint, where they can cuase symptoms of free fragments or joint mice. They then embed in the synovium and not to be free in the joint after a while.
It is usually necessary to perform a complete synovectomy to relieve the symptoms.
Differential diagnosis:
1-chondrosarcoma, histologivally for the calcified type.
2-pigmented villonodular synovitis for non calcified type.
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