The deltoid ligament is a ligament that exists on the medial aspect of the ankle. The superficial fibers of the ligament connecting the medial malleolus to the navicular, talus, and medial calcaneus bones. The deep fibers of the ligament connect the medial malleolus to the talus bone.


Tenderness, swelling, and ecchymosis distal to the medial malleolus may be a sign of a deltoid ligament sprain.