Acute traumatic spondylolysis. Report of a case and review of the literature.

Acute traumatic bilateral spondylolysis and spondylolisthesis was observed in a 34-year-old man. The literature on pathologic and biomechanical factors leading to acute fracture of the pars interarticularis emphasizes the importance of distinguishing spondylolysis resulting from acute trauma from the more common lytic-fatigue pars defect.