A case of a benign, cystic intrapulmonary teratoma occurring in the left lobe of a 63-yr-old female is described and the typical clinical symptoms and distinguishing X-ray appearances which may be helpful in diagnosing this rare tumour are mentioned. The connection between the tumor and the segmental bronchus clearly established the true intrapulmonary nature of the lesion in this case and the unusual finding of thymic tissue within the wall supports previous speculation regarding the possible thymic origin of these neoplasms.

1. One hundred and twenty cervical spines removed at routine necropsy from elderly patients dying in a general hospital have been examined. 2. There was some degree of degeneration of intervertebral discs in 110 cases–in forty-six this was severe. 3. Degenerative disc disease was found at an earlier age in men; mild damage preceded severe degeneration and collapse by about a decade. 4. Discs of the lower spine were most frequently and most severely affected. 5. Alterations of the normal cervical lordosis were produced by disc disease in thirty-two cases. 6. Osteoarthritis of the apophysial joints was found in seventy-eight, and by contrast to disc degeneration was commonest in the mid-cervical and upper cervical regions. In eighteen it was severe. 7. Degeneration and scarring of nerve roots was frequently associated with diseased discs; apophysial joint arthritis was found to be an important additional factor when it occurred in the lower cervical region. 8. No nerve root changes could be attributed to ischaemia resulting from narrowing or distortion of the vertebral arteries. 9. Cystic arachnoidal diverticula which excavate the posterior root ganglia were found in thirty-six cases.

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Circulating thymus-dependent (T) lymphocytes were estimated in twenty-seven patients with progressive systemic sclerosis (PSS) and in forty-five normal controls using the property of T lymphocytes to form rosettes with sheep red blood cells. The patients with PSS were found to have a reduction of T lymphocytes which correlated with the extent of visceral involvement by the disease, those with the lowest counts having the most extensive disease. These findings support the suggestion that immunological factors may be involved in the pathogenesis of PSS.