A rare mimic of adult-onset asthma: Case report and review of the literature.

Adult-onset asthma is extremely variable in its phenotypic presentation and has gained notoriety for the overall poorer treatment outcomes even on standard asthma therapy. Tracheal tumours are rare but when present, exhibit asthma-like phenomenon in adult patients posing great diagnostic challenges. We report two adult patients with tracheal adenoid cystic tumours who were initially treated for adult-onset asthma.