Edema and thickening of the deep deltoid ligament fibers including anterior and posterior tibiotalar ligaments related to ATTL and PTTL sprain. The superficial components of the deltoid ligament complex including tibionavicular, tibiospring and tibiocalcaneal ligaments are intact.
Bone marrow edema also is seen at the medial talar dome and medial pole of the navicular bone.
Type II accessory navicular bone is present.
Mortise joint effusion is noted.