Tracheobronchomegaly or Mounier-Kuhn syndrome is a very rare condition characterized by dilatation of the trachea and main bronchi, bronchiectasis and recurrent respiratory tract infections. The causality of this syndrome is unclear and the clinical representation is variable. The diagnosis is mostly established on the basis of characteristic CT scan findings. We report the case of a 65-year-old female with a history of recurrent lower respiratory tract infections, that was not initially diagnosed by repeated chest radiographs, but was later identified by CT scan