Sulcus angle (knee)
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At the time the article was created Edgar Lorente had no recorded disclosures.View Edgar Lorente's current disclosures
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The angle is formed by the trochlear opening of the knee, measuring the angle between the medial and lateral facets. Classically described in axial x-rays of the knee performed at 30-45º of flexion (skyline view), it is valuable in both CT and MR studies.
Its normal value is 135±10º. When the angle of the groove is >145-150º, trochlear dysplasia can be diagnosed. This condition reflects an incongruence in the patella's sliding over the femoral trochlea, which can result in patellofemoral instability.
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