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
Fleischner sign on barium study is seen in? 
Select and explain. 
A. Ileocecal TB, B. Crohn's disease, C. Small bowel carcinoid, D. Typhoid
A: Ileocecal TB
Answer: A: Ileocecal TB 
Explanation: 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.