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American Journal of Roentgenology, Vol 171, 1361-1365, Copyright © 1998 by American Roentgen Ray Society

ARTICLES

Lower esophageal mucosal ring: correlation of referred symptoms with radiographic findings using a marshmallow bolus

DF Smith, DJ Ott, DW Gelfand and MY Chen
Department of Diagnostic Radiology, Wake Forest University School of Medicine and Baptist Medical Center, Winston-Salem, NC 27157, USA.

OBJECTIVE: The purpose of this investigation was to determine the prevalence of lower esophageal mucosal rings and to correlate the relationship between these mucosal rings and the presence and anatomic level of symptoms evoked using a marshmallow bolus. SUBJECTS AND METHODS: Our prospective study included 130 patients who underwent barium examination of the esophagus. All patients completed a questionnaire regarding the anatomic location of their symptoms of dysphagia. In addition to a multiphasic examination of the esophagus, all patients also underwent fluoroscopic observation and videotaping while swallowing a marshmallow bolus; any symptoms that were provoked were recorded. RESULTS: Lower esophageal mucosal rings were shown in 26 (20%) of the 130 patients. The diameter of the rings was 9-12 mm in six patients, 13-20 mm in 18 patients, and larger than 20 mm in two patients. In 16 (62%) of the 26 patients, a marshmallow bolus became impacted at the ring; the impaction caused dysphagia in 12 (75%) of the 16 patients. In these 12 patients, dysphagia was referred to the neck in seven, the sternal angle in two, the mid chest in two, and the lower chest in one patient. None of the 12 patients had a pharyngeal or cervical esophageal abnormality that would account for their symptoms. CONCLUSION: Because proximal referral of symptoms is common in patients with lower esophageal mucosal rings, a thorough radiographic examination of the entire esophagus and esophagogastric region is required regardless of the level of their swallowing complaints.
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