Fig. 23.63 Renal osteodystrophy: skull changes. The radiological appearances of renal osteodystrophy consist of areas of both demineralisation and sclerosis. These changes are thought to be due to a combination of osteomalacia, secondary hyperparathyroidsm and a calcitonin effect. This lateral film of the skull of a 1 7-year-old girl with chronic renal failure shows marked calvanal thickening with considerable mottling. Sometimes such change may resemble Paget's disease. The skull base and the cervical spine are dense and there is loss of the lamina dura of the teeth.
