SYNOVIAL (OSTEO) CHONDROMATOSIS
: Nodules of metaplastic cartilage within the synovial membrane associated with loose bodies within the joint cavity were found in 1/1(100%) of the cases of present study.
(1,2) Several clinical abnormalities associated with OPK have been reported, including rheumatoid arthritis, synovial chondromatosis
, and, more frequently, dermatological pathologies (such as dermatofibrosis lenticularis disseminata, keloid formations and scleroderma-like lesions).
The causes of bodies include arthritis, osteochondritis dissecans (OCD), trauma, foreign body, and synovial chondromatosis
. The location is often dictated by the underlying disorder.
The authors suggested that synovial chondromatosis
is yet another form of the synovial reaction and supported their theory by the coincidence of the two conditions in two cases, as well as the similar age distribution of the two conditions.
The radiological differential diagnosis includes periosteal chondroma, and if any intra-lesional calcification calcific tendinitis and synovial chondromatosis
also kept in mind.
Extraskeletal chondromas occur as multiple nodules of synovial chondromatosis
within a joint, as a solitary lesion within or adjacent to joint, or as an isolated cartilagenous lesion in the soft tissues, mostly of the hands and feet.
Other features are bone erosions, synovial cyst, degenerative changes, and chondromatosis
. On MRI, our patient presented both the typical signal characteristics and a marked effusion.
And it has clinical importance in various tumour and tumour like conditions like ganglion cyst, synovitis, lipoma, synovial chondromatosis
, focal villonodular synovitis, osteochondroma or para articular chondroma, chondrosarcoma and hoffa's disease (5).
These fragments may then adhere to the synovial membrane and cause fibrosis or chondromatosis
, eventually forming osteophytes or subchondral cysts (5).
Patients with the diagnoses of intrinsic type stiffness such as osteochondritis dissecans, osteoarthritis, inflammatory arthritis, intra-articular fractures, synovial chondromatosis
(5) It has to be differentiated from osteoblastic metastasis, tuberous sclerosis, mastocytosis, melorheostosis, osteopathiastriata, and synovial chondromatosis
. Uniform size, symmetrical periarticular distribution with a normal bone scan or slightly increased activity, normal alkaline and acid phosphatase help to differentiate osteopoikilosis from osteoblastic metastasis where there is asymmetry, axial skeleton involvement, bony destruction, and positive bone scan.
is a benign disorder that involves the formation of cartilaginous nodules in the synovium of joints, tendon sheaths, and lining of the adjacent extraarticular bursae.