Malleolus is the name for the bony prominence on each side of the ankle. Medial malleolus The medial surface of the lower extremity of tibia is prolonged downward to form a strong pyramidal process, flattened from without inward - the medial malleolus. The medial surface of this process is convex and subcutaneous. The lateral or articular surface is smooth and slightly concave, and articulates with the talus. The anterior border is rough, for the attachment of the anterior fibers of the de… (More on Malleolus)