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': "Fleischner sign on barium study is seen in? \nSelect and explain. \nA. Ileocecal TB, B. Crohn's disease, C. Small bowel carcinoid, D. Typhoid", 'role': 'user'}, {'content': 'Answer: A \nExplanation: Answer- A. Ileocecal TBEarly involvement of the ileocaecal region manifesting as spasm and edema of the ileocecal valve.Thickening of the Iips of the ileocecal valve and/or wide gaping of the valve with narrowing of the terminal ileum (\'Fleishner" or \'inveed umbrella sign\') are characteristic.', 'role': 'assistant'}]