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: Surgery
[{'content': 'commonest benign tumor of the esophagus- \nSelect and explain. \nA. Leiomyoma, B. Papilloma, C. Adenoma, D. Hemangioma', 'role': 'user'}, {'content': 'Answer: A \nExplanation: • Leiomyoma is MC benign esophageal tumor.\n• The average age 4th-5th decades, more common in males.\n• Originate in smooth muscle, 90% are located in lower two thirds of the esophagus.\n• Usually solitary and typically oval.\n• They remain intramural, having the bulk of their mass protruding toward the outer wall\n• The overlying mucosa is freely movable and normal in appearance.\nClinical Features\n• Many leiomyomas are asymptomatic. Dysphagia and pain are MC symptoms.\n• Location and size tend not to correlate consistently with symptoms\nDiagnosis\n• Barium swallow is IOC for leiomyoma (classical, smooth, contoured, punched-out defect)\n• Endoscopy: Freely movable mass, which bulges into the lumen,\n• Should not be biopsied because of an increased chance of mucosal perforation at the time of surgical enucleation.\nTreatment\n• Enucleation is TOC for leiomyoma.', 'role': 'assistant'}]