In 1947, Neuhauser and Berenberg (22) described the mechanism for some cases of persistent vomiting in infancy under the term cardioesophageal relaxation or chalasia. The free flow of a barium mixture between the stomach and the persistently dilated esophagus, under the influence of position and gravity (Fig. 1), was attributed to temporary neuromuscular dysfunction involving the diaphragm and the intrinsic gastroesophageal musculature. Local disease in the region of the gastroesophageal junction or in the central nervous system was believed to account for some cases. The condition was to be differentiated from “congenital short esophagus” and partial intrathoracic stomach due to diaphragmatic hernia; prompt and gratifying cessation of symptoms was said to occur if the infant was maintained in an erect position. This postural treatment impeded reflux of gastric contents into the esophagus, and within three to four weeks clinical and radiologic recovery took place. Subsequently, English observers (2, 6), also concerned with the problem of vomiting in children, reported that partial thoracic stomach (Fig. 2) was a more common cause for gastroesophageal incompetence than chalasia. Moreover, the development of what had previously been called “congenitally short esophagus” (Fig. 3) was shown to occur as a sequel to the gastroesophageal incompetence of the malpositioned cardiac orifice. Largely through the work of the British group, it now appears clear that the condition previously known as congenital short esophagus probably represents shortening due to cicatricial contraction of a chronically inflamed esophagus irritated by reflux of gastric contents in the course of persistent vomiting. Experimental studies in animals (7) have shown that direct stimulation of the vagus nerve, or of the gallbladder, the peritoneum, or other intra-abdominal structures, can result in reflex contraction of the esophagus which, if the thorax is open, can produce a definite esophageal hiatus hernia of the stomach. Why the herniation does not occur, although the contraction does, if the thorax is closed, has not been explained. The irritation of the reflux esophagitis is thought to be able to produce such reflex shortening of the esophagus. This disordered arrangement of structures, according to popular theory, then aggravates any pre-existing cardioesophageal insufficiency and further reflux occurs to the extent that cicatricial scarring not only produces irreversible change but may actually lead to stricture formation. Although the majority of infants with partial thoracic stomach apparently respond to postural treatment comparable to that used for chalasia, surgery has been considered for the prevention of strictures.
Read full abstract