<prompt> Topical mitomycin -C is used inSurge Weber syndromeLaryngo tracheal stenosisEndoscopic AngiofibromaSkull base osteomyelitis  <response>: Application of topical mitomicin C after endoscopic dilation of laryngo tracheal stenosis reduces the rate of Re stenosis It is also useful for anal carcinoma and superficial bladder cancer Refer American college of chest physicians, 2008 