. Subchondral Cyst. PORTNotes. In: OrthopaedicsOne - The Orthopaedic Knowledge Network. Created Feb 16, 2009 16:53. Last modified Jan 05, 2010 11:13 ver.3. Retrieved 2014-03-10, from http://www.orthopaedicsone.com/x/OwEjAQ.
DEFINITION AND PATHOGENESIS
- A secondary juxta-articular cyst associated with an inflammatory or non-inflammatory (degenerative) arthridity
- One of the four cardinal radiographic findings in arthritis: joint space narrowing, subchondral sclerosis, osteophyte formation, and subchondral cysts
- Symptoms of degenerative joint disease dominate
- Subchondral lucency with sclerotic rim
- MRI reveals lesion filled with fluid
- Mucinous material within the cyst
- Synovial lining to the cyst
DIFFERENTIAL CLINICOPATHOLOGIC DIAGNOSIS
- Same as intraosseous ganglion cyst, although associated radiologic findings give supporting diagnostic evidence
DISEASE COURSE AND TREATMENT
- Non-steroidal anti-inflammatory Rx, activity modification, assistive devices, ultimately, total joint replacement
- Gas containing cysts of the sacrum or ilium ? vacuum phenomena in the SI joint reportedly asymp-tomatic and an incidental finding
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