Decreased tibio-fibular overlap (normally >6mm on AP films measured 1 cm proximal from the tibial plafond) 
Increased tibio-fibular<unk>  clear space (normally <6mm on AP films measured 1 cm proximal from the tibial plafond)
Increased medial clear space (normally <5mm)
Ankle syndesmosis injury
Ankle sprain
Degloving injury
Ankle dislocation
Acromioclavicular joint injury
Ankle fracture
Radiograph-negative ankle injury 
Ankle fracture 