An intraosseous ganglion is a benign subchondral radiolucent lesion without degenerative arthritis.
Tends to occur in middle age.
Patients may have mild localised pain.
They are uni-/multilocular cysts surrounded by a fibrous lining, containing gelatinous material.
- mucoid degeneration of intraosseous connective tissue perhaps due to trauma/ischemia
- penetration of juxtaosseous soft-tissue ganglion (=synovial herniation) into underlying bone (occasionally)
Common locations are:
- epiphyses of long bones (medial malleolus, femoral head, proximal tibia, carpal bones)
- subarticular flat bone (acetabulum)
Typically well-demarcated solitary lytic lesion, with a sclerotic margin. No communication with joint can be demonstrated.
Bone scans demonstrate increased radiotracer uptake (in 10%).
- post-traumatic/degenerative cyst
Synonyms & Alternative Spellings
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|Intraosseous ganglion cyst||✗|
|Intraosseous ganglion cysts||✗|