Mounier-Kuhn SyndromeSimon, Marioara PhD; Vremaroiu, Petrut MD; Andrei, Fabian MDJournal of Bronchology & Interventional Pulmonology: April 2014 - Volume 21 - Issue 2 - p 145–149 doi: 10.1097/LBR.0000000000000068 Bronchoscopic Images Abstract Author Information Mounier-Kuhn syndrome or congenital tracheobronchomegaly is a rare clinical and radiologic condition. It is characterized by a tracheal and bronchial dilation. Fewer than 100 cases have been reported in the medical literature since the original description in 1932. The first utilization of bronchoscopy for diagnosis of this condition was recorded by Lemoine only in 1949. The cause of this condition is not clearly understood; however, histopathologic findings of atrophy of smooth muscles and elastic tissue in the trachea and main bronchi have been observed. Tracheobronchomegaly can be associated with tracheal and bronchial diverticuli. Pneumology Hospital “Leon Daniello” Cluj-Napoca, Romania Supplemental Digital Content is available for this article. Direct URL citations appear in the printed text and are provided in the HTML and PDF versions of this article on the Journal's Website, www.bronchology.com. Disclosure: There is no conflict of interest or other disclosures. Reprints: Marioara Simon, PhD, 36 Densusianu street, Cluj-Napoca, cod 400428, Romania (e-mail: firstname.lastname@example.org). Received June 8, 2013 Accepted March 3, 2014 © 2014 by Lippincott Williams & Wilkins.