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Pseudomasses in the suprapatellar pouch at arthrography
Journal of the Canadian Association of Radiologists
|December 1, 1980
Summary
Synovial chondromatosis can be misdiagnosed. Normal variants of the suprapatellar pouch, like plicae synovialis, can mimic synovial masses, avoiding unnecessary surgery.
Area of Science:
- Orthopedic Surgery
- Radiology
- Anatomical Variants
Background:
- Synovial chondromatosis is a condition characterized by the formation of cartilage nodules within the synovial membrane.
- Accurate diagnosis is crucial for appropriate treatment and patient management.
Observation:
- An arthrographic diagnosis of synovial chondromatosis was made, but surgery revealed no abnormalities.
- This discrepancy prompted an investigation into potential causes of misdiagnosis.
Findings:
- A normal variant of the suprapatellar pouch, specifically the plicae synovialis (an embryonic remnant), can present as pseudomasses on arthrography.
- These pseudomasses may be mistaken for synovial chondromatosis.
Implications:
- Careful arthrographic technique, fluoroscopic palpation, and clinical correlation are essential to differentiate plicae synovialis from true synovial masses.
- Avoiding unnecessary arthrotomy can prevent patient morbidity and reduce healthcare costs.