Secondary synovial chondromatosis
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Secondary synovial chondromatosis or secondary osteochondromatosis is a disorder that denotes intra-articular loose bodies secondary to joint pathology such as trauma, osteoarthrosis, infections, or neuropathic osteoarthropathy.
The loose bodies are fragments of bone, cartilage, or a combination of both, that have broken off the joint. If these fragments receive nourishment from the joint synovium, they endure and enlarge rather than atrophy.
The intra-articular bodies in secondary osteochondromatosis are usually larger, lesser in number, vary in size and shape, and frequently ossify, compared with those of primary chondromatosis.
A lamellated appearance has been ascribed to the nodules of secondary chondromatosis, resulting from their gradual evolution within the joint space. There is evident nearby joint pathology (including osteoarthritis).
more numerous, smaller, round intra-articular bodies of approximately the same size
not associated with degenerative change