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Journal of Radiological Review 2020 May-June;7(3):237-40

DOI: 10.23736/S2723-9284.20.00023-4


language: English, Italian

A rare case of displaced tracheal bronchus as a cause of recurrent bronchitis and cystic bronchiectasis in an adult patient

Anna SIKORA , Valentina SETTINO, Maria PETULLÀ, Anna ROTUNDO, Francesco MANTI, Domenico LAGANÀ

Mater Domini Polyclinic Radiology Unit, Department of Experimental and Clinical Medicine, Specialization School in Radiodiagnostics, Magna Græcia University, Catanzaro, Italy


Tracheal bronchus is an unusual congenital condition in which the right upper lobe bronchus originates directly from trachea or one of the main bronchus. Usually it arises from the right lateral wall of trachea, within 2 cm above the carina. The incidence of tracheal bronchus has been reported to range from 0.2% to 5%. It can be divided into supernumerary type or displaced type. The term supernumerary refers to an abnormal bronchus that arises in addition to the normal corresponding bronchus. Tracheal bronchus is defined as the displaced type when the normal right upper lobar bronchus or segment is missing. When the entire right upper lobe bronchus is displaced on the trachea, it is classically termed “pig bronchus.” The tracheal bronchus may be isolated or linked with other congenital abnormalities. In adult patients tracheal bronchus generally cause no symptoms and is usually discovered, as incidental finding, during radiological investigation or bronchoscopy. However, in pediatric population it may sometimes be related to localised pulmonary problems, including recurrent pneumonia, chronic bronchitis and bronchiectasies. We report below a clinical case of 81-year-old male patient that was referred to our department for recurrent bronchitis. He had a chest X-ray performed showing a suspicion of the tracheal bronchus. We then decided to proceed with High Resolution Computed Tomography (HRCT) scan that confirmed a presence of an anomalous bronchus to the right upper lobe directly arising from the right side of distal trachea.

KEY WORDS: Bronchi; Bronchitis; Tomography, X-ray computed

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