Plain radiographs
AP, Lateral, and Mortise views of ankle
CT often necessary to reveal amount of articular surface displacement/develop treatment plan
AP, Lateral, and Mortise views of ankle
Assess distal pulse, motor, and sensation
Inspect skin for signs of open<unk> 
Suspect other<unk>  as well, given mechanism:
Lumbar spine (esp L1), calcaneus, talar dome, tibial plateau, femoral neck, acetabulum,
Monitor for compartment syndrome
Lumbar spine (esp L1), calcaneus, talar dome, tibial plateau, femoral neck, acetabulum,
Pilon fracture
Tibial plateau fracture
Olecranon fracture 
Tibial shaft fracture
Olecranon fracture
Pisiform fracture
Maisonneuve fracture
Odontoid fracture