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medial malleolus
The Lateral Malleolus is part of the fibula.
No, the lateral malleolus is the distal end of the fibula. The medial malleolus is the distal end of the tibia.
Fibula
The ancle has two lateral bones - the tibia ends at the ancle with the medial malleolus and the fibia ends at the ancle with the lateral malleolus