In some cases of dilatation, circumscribed and general, food is sometimes retained for an entire day or more before it is ejected. The decomposition of the retained food usually produces a more or less continuous foul odor from the mouth.
The course of the affection is progressively from bad to worse, and entails ultimate emaciation. Some patients succumb early, and some live to advanced age. Perforation of the oesophagus ensues in some instances, and death results in consequence of the injuries sustained by perioesophageal structures by the escape of the contents of the oesophagus. Perforation is indicated by sudden collapse and by emphysema from swallowed air.
PATHOLOGY AND MORBID ANATOMY.—Dilatation of the oesophagus is either general or partial, according as it takes place in the whole or greater portion of the oesophagus or in a circumscribed portion. Partial dilatation may involve the entire circumference of the canal (annular dilatation), or it may implicate but a portion of the wall, which becomes pouched into a sac externally (diverticulum or saccular dilatation).
| FIG. 19. |
| Fusiform Dilatation of Oesophagus (Luschka). A, Larynx; B, Thyroid gland; C, Trachea; D, Oesophagus; E, Stomach. |
General dilatation, though sometimes congenital, is, as mentioned under Etiology, more frequently the mechanical result of distension of the oesophagus by food or drink prevented from ready entrance into the stomach by a constriction at the cardiac orifice. This form of dilatation is sometimes discovered as a post-mortem curiosity. The muscles have usually undergone great hypertrophy, and the mucous membrane some thickening and congestion, with erosions and sometimes ulcerations, indicative of chronic oesophagitis. In some instances all the coats of the oesophagus have undergone hypertrophy. The dilatation may vary from slight enlargement to the thickness of an ordinary man's arm or larger (Rokitansky31); in rare cases, even a capacity nearly equal to that of the stomach (Luschka32 and others). (See Fig. 19.)
31 Path. Anat.
32 Arch. für Anat., etc., March, 1868, p. 473.
The oesophagus is usually fusiform or spindle-shaped, being constricted at those portions at which it is normally slightly constricted. Sometimes the dilatation takes place between the lobes of the lungs (Raymond33).
33 Gaz. méd. de Paris, 1869, No. 7, p. 91.