This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: ENT
Topical Mitomycin C is useful in treatment of 
Select and explain. 
A. Angiofibroma, B. Tracheal stenosis, C. Skull base Osteomyelitis, D. Laryngeal carcinoma
B: Tracheal stenosis
Answer: B: Tracheal stenosis 
Explanation: Dilation for laryngotracheal stenosis is typically done using serial dilation using various sizes of Jackson bronchoscopes. The various studies have showed that mechanical dilation used alone can have a recurrence rate of stenosis of greater than 90%. Thus, various adjunctive procedures have been developed in order to try to decrease the rate of restenosis. Mitomycin-C is an example of one of these adjunctive agents. Ref : Internet sources