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Snapping knee caused by intra-articular tumors
Takatomo Mine1, Koichiro Ihara, Tosihiko Taguchi
1Department of Orthopaedic Surgery, Yamaguchi University School of Medicine, Yamaguchi, Japan. tmine@po.cc.yamaguchi-u.ac.jp
Summary
Intra-articular knee tumors can cause mechanical symptoms like locking without prior injury. Diagnosis can be challenging, even with imaging, due to tumor characteristics.
Area of Science:
- Orthopedic Surgery
- Oncology
- Radiology
Background:
- Knee locking can occur without a history of injury.
- Intra-articular tumors are uncommon causes of knee mechanical symptoms.
Observation:
- Two cases of knee locking due to intra-articular tumors were identified.
- Patients presented with mechanical symptoms and a palpable medial patellofemoral mass.
- Histologic examination revealed amorphous necrotic tissue, complicating diagnosis.
Findings:
- Impingement of intra-articular tumors can lead to knee locking.
- Mechanical symptoms are a key presentation.
- Palpable masses in the patellofemoral joint may indicate underlying tumors.
Implications:
- This highlights the importance of considering intra-articular tumors in the differential diagnosis of unexplained knee locking.
- Further investigation may be needed for definitive diagnosis of soft-tissue knee masses.
- Early detection and diagnosis of intra-articular tumors are crucial for effective management.