- The patient stands flat footed on one leg while the examiner supports the patient by holding their outstretched hands.
- The patient then flexes the knee to 5° and rotates the femur on the tibia medially and laterally three times, while maintaining the 5° flexion.
- The test is then repeated at 20° flexion.
Positive Thessaly test:
- The test is considered positive for a meniscus tear if the patient experiences medial or lateral joint line discomfort or a sense of locking/ catching in the knee.
- Sensitivity: 64-66 %
- Specificity: 39-53 %
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- Campbel's Operative Orthopaedics 13th Book