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1779 J. Aitken Systematic Elements Theory & Pract. Surg. cxl. 144 It is difficult precisely to determine under which subdivision of the head Tumor..(whether the encysted or diffused) Pneumatosis should be arranged. It consists of condensed air effused from a wound of the lungs.

1800 W. Nisbet Clin. Guide: Pt. IV 381 The spontaneous Pneumatosis (spontanea).

1822 J. M. Good Study Med. IV. 426 This [cellular inflation] is the pneumatosis of Sauvages and Cullen.

1866 A. Flint Treat. Princ. Med. 51 In connection with morbid changes in the composition of parts, may be appropriately noticed those which depend on the presence of air or gas in abnormal situations, and their abnormal amount in places in which they exist to a certain extent in health. Morbid conditions of this kind are collectively called pneumatoses.

1889 S. S. Wallian tr. J. N. Demarquay Ess. Med. Pneumatol. p. v In our essay the object has been to study those diseases in which the gases play a certain rôle, as the pneumatoses and the emphysemas, and to study the applications which may be made of the gases in therapeutics.

1968 Jrnl. Pediatrics 73 601/1 A review of the literature at that time failed to disclose any reports of the occurrence of portal venous gas in the enterocolitis of Hirschsprung's disease, even when colonic pneumatosis was present.

1977 Brit. Jrnl. Surg. 64 590/2 Pneumatosis cystoides intestinalis may affect any part of the small or large bowel, may be localized or extensive and may occur at any time from infancy to old age.

1995 European Respiratory Jrnl. 8 1807/1 Epidural pneumatosis, also called pneumorrhacis or aerorachia, accounts for the visualization of air in the spinal epidural space.