This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Medicine
Steakhouse syndrome or intermittent food impaction is due to which of the following anomaly? 
Select and explain. 
A. Schatzki ring, B. Felin esophagus, C. Achalasia cardia, D. Esophageal carcinoma
A: Schatzki ring
Answer: A: Schatzki ring 
Explanation: Esophageal rings : distal rings are usually associated with episodic solid food dysphagia and are called Schatzki rings. Patients typically present older than 40 years, consistent with an acquired rather than congenital origin. Schatzki ring causes intermittent food impaction, also known as steakhouse syndrome. Symptomatic rings are treated by dilatation. Reference: Harrisons Principles of Internal Medicine, 18th Edition