A-rings are a type of distal esophageal ring. They are above the B-ring and occur a few centimeters proximal to the gastro-esophageal junction. They represent a physiological contraction of esophageal smooth muscle covered by mucosa. A-rings are uncommonly symptomatic.
Related Radiopaedia articles
- esophageal dysmotility
- esophageal tumors
- benign esophageal neoplasms
- malignant esophageal neoplasms
- gastro-esophageal reflux disease
- esophageal stricture