“ Due to benign synovial neoplasia, which forms nodules that often calcify. It is more common in men aged 30-50 years and most commonly aff...
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Due to benign synovial neoplasia, which forms nodules that often calcify. It is more common in men aged 30-50 years and most commonly affects a single joint, usually the knee. It is self-limiting, but may recur following resection, and rarely transforms to chondrosarcoma.
PLAIN FILM/CT
• Intra-articular chondroid (‘ring and arc’) calcification—pathognomic
• Extrinsic erosion of the bone on both sides of the joint
MRI
• Lobulated, homogeneous intra-articular signal, which is intermediate on T1 and high on T2.
• May contain low T1/T2 foci (calcification), more obvious on gradient echo (susceptibility artefact).
• No haemorrhage, unlike PVNS.
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