What it is
The kneecap moves partly or completely out of the trochlear groove, usually laterally. It may be a first traumatic episode or recurrent instability influenced by anatomy and functional control.
Typical clinical symptoms
- Feeling the kneecap shift or about to dislocate
- Visible deformity during acute dislocation
- Pain and swelling, often medially after reduction
- Apprehension during running or direction changes
Video
No video has been added for this condition yet.
Scientific literature
External publications selected for this topic. Their scope may cover a specific condition, population or intervention within this topic; they do not constitute an individual treatment plan.
Patellar instability.
Literature review · 2008
Knee
When does the knee need medical guidance?
Deformity after trauma, inability to bear weight, a fully locked knee, immediate major swelling, a hot red knee with fever, or a change in foot pulse, colour or sensation require prompt medical assessment.
Descriptions are for orientation. Diagnosis follows history, clinical examination and, only when indicated, imaging or laboratory tests.
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