Further examples of congenital narrowing of the spinal canal in the lumbar and cervical regions are presented. It is implied that the condition is a nosological entity. Neurogenic intermittent claudication often accompanies the lumbar variety; the diagnosis in the cervical region is, however, radiological. The similarity to some of the features of achondroplasia is stressed. Symptoms are usually relieved by an adequate laminectomy. See also: Discussion .