1. Traumatic spondylolisthesis occurs more frequently in the male than in the female.
2. Severe trauma played an important causative rôle in all of the cases studied, with one exception.
3. The clinical history and physical signs do not differ materially from those of other irritative lesions of the lumbosacral articulation.
4. Lateral roentgenologic examination reveals the only positive evidence of the existence of spondylolisthesis.
5. An attempt may be made to reduce the deformity. This failing, the vertebra should be fixed by surgical measures.
6. Hibbs' spinal fusion offers a satisfactory means of operative fixation in spondylolisthesis.