Double level Chance-type fractures of spine in ankylosing spondylitis.

Chance fractures are usually associated with seat belt injuries. Mechanism is always related to flexion-distraction at vertebral level. Double level Chance-type fractures have rarely been reported in published literature. We presented such a fracture at D10 and L3 level in a 38-year-old patient with ankylosing spondylitis. Management was done with posterior decompression and short segment fixation separately.