Wilson's Test

Definition/Description

The Wilson’s Test is a test used to detect the presence of Osteochondritis dissecans of the knee. [1]

Clinically Relevant Anatomy

Technique

The test has to be performed as followed:[1]
- Ask the patient to sit on a table with his legs dangling over the edge.
- Bend the patient’s knee so that it is flexed at a 90° angle.
- Grasp the patient’s foot and bring the tibia in internelly rotation.
- Instruct the patient to extend his leg until he/she feels pain.


The test is positive when the patient reports pain in the knee about 30° from full extension and when by rotating the foot back (externally rotation of the tibia) in it’s normal position the pain disappears.[1][2]


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Key Research

So far no studies have been done about the validity and the reliability of this test.

Clinical Bottom Line

Make sure the patient gradually extends his leg during the test, instead of thrusting it out quickly.

References

  1. 1.0 1.1 1.2 Conrad JM et al, “OSTEOCHONDRITIS DISSECANS: WILSON'S SIGN REVISITED”, September 2003, Am J sport med.
  2. J. Bone et al, “A diagnostic sign in osteochondritis DISSECANS OF THE KNEE.”, 1967.