Abstract
MRI of the thorax was performed in 24 children aged between six weeks and five years, in whom a tracheal stenosis had been demonstrated by bronchoscopy. Since bronchoscopy can only demonstrate the interior of the trachea, various imaging methods, such as CT and angiography, were used to demonstrate the topography and cause of the tracheal stenosis. MRI has shown that the most common cause of a stenosis in the central section of the trachea is focal compression by an aberrant brachiocephalic trunk (10 cases). Stenosis of the distal trachea could be due to anomalies of the aortic arch (5 cases), a dilated pulmonary artery (4 cases) or a soft tissue mass (3 cases). In all these patients, MRI was greatly superior to the conventional methods. By using a special technique, MRI made it possible to clarify the cause and localisation of a tracheal stenosis by a non-invasive examination.
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