The condition is also known as a malleolar flare, in reference to the malleolus, the bony prominence on each side of the ankle.
The lateral malleolar sulcus is the posto-inferior groove on the distal part of the fibula.
The medial malleolar sulcus is the posto-inferior groove just lateral to the medial malleolus on the distal part of the tibia.
Then, an aperture is created from the postero-superior side of the fibula to the lateral malleolar tip.
