<prompt> An 8-month-old infant had stridor with respiratory difficulty which worsened on crying. On examination, laryngoscopy showed a red mass in the subglottic area. All the following are used in the treatment EXCEPTCO 2 laser vaporizationCoicosteroidsTracheostomyRadiotherapy  <response>: History and examination suggest diagnosis is juvenile papilloma - They are viral in origin and multiple, often involving infants and young children. They are mostly seen on the true and false cords and the epiglottis, glistening white, irregular growth, pedunculated Or sessile, friable and bleeding easily 