Paget's disease of the lumbar spine.

The frequency and extent of lumbar spondylosis is no greater in patients with Paget's disease (osteitis deformans) affecting the lumbar spine than in control groups, whether or not the disease is accompanied by deformity of vertebrae, and we have found no evidence that Paget's disease predisposes to our enhances lumbar spondylosis. The similarity of distribution of the Paget's disease and of degenerative spondylosis raises the possibility that bone stress may be an aetiological factor in the formation of Paget's disease of bone.