[Diagnostic imaging of tracheobronchial tuberculosis. Apropos of a case]

We report a new case of tracheo-bronchial tuberculosis. Diagnosis was suggested on CT examination first and then confirmed by endoscopy and bacteriological examinations. We discuss the possible mechanisms of stenosis. We present the radiological features of tracheo-bronchial tuberculosis, mainly helical CT features and we discuss and illustrate differential diagnosis. We emphasize the role of 3 D and multiplanar reconstructed CT images that may help visualizing the stenosis at different levels, its craniocaudal extent as well as the boundaries between the stenosis and surrounding tissues. Moreover helical CT appears superior to bronchofibroscopy in diagnosing peribronchial infiltration.