Mounier-Kuhn syndrome masquerading pulmonary thromboembolism in an elderly male

Early manifestation of ARDS in COVID-19 infection in a 51- year-old man affected by Mounier-Kuhn syndrome

A 51-year-old man known to be affected by Mounier-Kuhn syndrome (MKS). presented to Accident & Emergecy (A&E) with fever, dyspnea and deterioration of his chronic coughs. Increased diameters of his trachea (39 mm), right (30 mm) and left (26 mm) main bronchi were revealed by chest computerized tomography (CT) scan. CT scan showed also ground-glass opacities (GGO) and bronchiectasis in the mid and lower zones of both lungs. COIVD-19 infection was eventually confirmed by RT-PCR. A severe form of COVID-19 could occur even in the early stages of the disease in presence of underlying co-morbidities including MKS, which increases the susceptibility to more recurrent and severe respiratory infections.

First Case Report of Metastatic Squamous Cell Carcinoma of Lung Associated with Mounier-Kuhn Syndrome and Review of Literature

Mounier-Kuhn syndrome is a relatively rare condition, mostly involving the trachea and main stem bronchi. It is caused either by the atrophy of elastic fibers or faulty fetal development of cartilage and smooth muscles, hence leading to an overall increase in the diameter of lower respiratory tract. No certain etiology was found in the majority of cases reported previously, however, several other connective tissue diseases have also been implicated with the congenital tracheobronchomegaly. One anecdotal case report mentioned the development of lung malignancy in a patient who had previously received external beam radiotherapy. Herein, we report the first case of Mounier-Kuhn syndrome in a 62-year-old male with a recent diagnosis of metastatic squamous cell carcinoma (SCC) of the lung.

Tracheobronchomegaly as a Cause of Bronchiectasis in an Adult

Mounier-Kuhn syndrome (MKS) is a rare congenital anomaly characterized by dilated trachea and main bronchi due to atrophy of the elastic fibers and smooth muscle cells of the trachea and major airways. Patients of MKS can have varied presentation. The diagnosis is established radiologically and bronchoscopically. There is no specific treatment for MKS. We present an adult man with MKS who presented with recurrent respiratory tract infection. The diagnosis was confirmed by imaging study and fiberoptic bronchoscopy.