Patellar Dislocation
Patellar dislocation occurs when the kneecap (patella) is forced out of its normal groove, almost always laterally. It causes intense knee pain and obvious deformity, but often relocates on its own as the leg is straightened.
Table of Contents
Quick Facts
- ICD-10: S83.0
Symptoms
- Sudden severe knee pain
- Visible deformity of the kneecap
- Inability to straighten the knee
- Swelling
- Sense of the knee 'giving way'
Treatment
- Reduction (often spontaneous when leg is straightened) — ER if needed
- X-ray and sometimes MRI to look for fractures or cartilage injury
- Brace and rest
- Physical therapy
- Surgery in recurrent cases (medial patellofemoral ligament reconstruction)
Reducing Recurrence
- Strengthening (quadriceps, especially VMO, and hip stabilizers)
- Bracing during sports
- Address underlying anatomic risk factors
Medical Disclaimer: This information is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always consult a qualified healthcare provider with questions about a medical condition. If you are experiencing a medical emergency, call your local emergency number immediately.
References
- American Academy of Orthopaedic Surgeons. Patellar Dislocation Information.