According to the Lauge-Hansen classification of ankle fractures, a supination–adduction (SA) Stage II injury produces which specific fracture combination?

• A Spiral fibular fracture at the level of the ankle mortise (infrasyndesmotic) + posterior malleolar fracture
• B Spiral fibular fracture above the syndesmosis + horizontal medial malleolus fracture
• C Transverse fibular fracture at or below the joint line + vertical medial malleolus fracture ✓
• D Comminuted fibular fracture at the level of the mortise + anterior tibial lip fracture

Explanation

In the Lauge-Hansen classification, the first word describes foot position at injury, the second describes the deforming force. Supination-Adduction (SA): Stage I = transverse avulsion fracture of the fibula at or below the tibiotalar joint (infrasyndesmotic); Stage II = vertical (or oblique) medial malleolus fracture from compressive impaction. This pattern is important because the medial malleolus fracture is vertical and requires anatomical reduction and fixation. Supination-External Rotation (SER) fractures produce spiral fibular fractures at the syndesmotic level.

Reference: Maheshwari Essential Orthopaedics, 6th ed.

High-yield for: NEET PGINI-CETNExTFMGEUSMLEPLABMRCP

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