11 Lon. Med. and Surg. Journ., 1836-37, No. 172, and Clinical Lectures, Dublin, 1864, p. 592.

Oesophagitis sometimes follows the deglutition of irritating medicines or moderately caustic poisonous substances not sufficiently acid to produce veritable traumatic oesophagitis. Mercury, codeina, and particularly tartar emetic, are cited as capable of exciting oesophagitis.

Large doses of tartar emetic, as formerly administered in pneumonia (Laennec12), sometimes produced a peculiar form of pustulous oesophagitis, not unlike the pustulous oesophagitis sometimes occurring as part of the local manifestations of small-pox.

12 Traité de l'Auscultation médicale, etc., Paris, 1837, vol. iii. p. 560, illustrated; Laboulbène, Anatomie pathologique, and Nouveau Dict. de Méd. et de Chir., vol. xxiv. p. 370, illustrated; Von Oppolzer, op. cit., p. 109.

Deuteropathic catarrhal oesophagitis occurs sometimes as an extension of catarrhal pharyngitis on the one hand, and of catarrhal gastritis on the other. It also occurs in scarlet fever, measles, and typhus fever. It is likewise consecutive to the various diseases and surgical lesions of the tube itself. Parasitic oesophagitis occurs as an extension of parasitic stomatitis or thrush. Deuteropathic circumscribed phlegmonous oesophagitis is sometimes produced by extension of inflammation from softened caseous bronchial glands at the bifurcation of the trachea, and by pressure from mediastinal tumors, aneurism of the aorta, etc.

Pseudo-membranous oesophagitis is almost always deuteropathic. It has been encountered chiefly in association with pseudo-membranous pharyngitis or diphtheria, and with croupous pneumonia, but likewise in enteric and typhus fever, in cholera and in dysentery, in measles, scarlatina, and small-pox, in nephritis, tuberculosis, carcinoma, and pyæmia.

In a case of hysteria, to be mentioned later, the entire epithelial coat of two-thirds of the oesophagus was discharged by emesis. In this respect the local disease—in that instance at least—resembles pseudo-membranous enteritis.

Traumatic oesophagitis is produced by the deglutition of corrosive substances, which destroy portions of the mucous membrane in their passage or excite a suppurative inflammatory process, or is produced by the passage of foreign bodies of sharp and irregular contour, or by the passage of surgical appliances, whether used for actual operations or for explorations merely.

In rare cases traumatic oesophagitis is the result of wounds with firearms or other weapons.

Phlegmonous oesophagitis may be the result of disease or injury of the interior of the oesophagus, or of its external coat by extension of disease from tissues surrounding it. Foreign bodies, arrested in the oesophagus or wounding it in their passage to the stomach; injuries from surgical appliances, exploratory or operative, employed in treatment for foreign bodies in the tube or in cases of stricture and morbid growth; and chemical irritants swallowed by accident or design,—are the chief causes in the former class of cases; but pustulous and pseudo-membranous oesophagitis must likewise be regarded as occasional causes. The causes operating upon the exterior of the tube primarily are suppurative laryngitis and tracheitis, tumefaction and softening of bronchial and tracheal lymphatic glands, and caries of the spine. Isolated cases have been attributed to emboli in connection with valvular diseases of the heart (Parenski, cited by Daton), and to fits of anger (J. Frank and Rigal, cited by Daton). In certain cases the cause is unassignable, and is then usually attributed to some dyscrasia, syphilis in particular.