Cappell Mitchell S. M.D. Ph.D.; Lebwohl, Oscar M.D.Journal of Clinical Gastroenterology: August 1991 Article: PDF Only Buy Abstract Although typically small and submucosal, esophageal granular cell tumors frequently produce dysphagia. Esophageal manometry and a cine-esophagram in a patient with a 7-mm-wide esophageal granular cell tumor and dysphagia showed esophageal aperistalsis and a hypertensive lower esophageal sphincter that relaxed normally with swallowing. This finding suggests that dysmotility may contribute to the dysphagia frequently attributed to this tumor. This tumor is commonly believed to originate from Schwann cells and has a propensity to encompass and disrupt nerves that could produce the abnormal motility. Esophageal manometry is recommended when a small nonobstructing granular cell tumor is found in the evaluation of dysphagia. © Lippincott-Raven Publishers.