[Right tracheal bronchus].

We present 3 cases of tracheal bronchus. The right tracheal bronchus is an uncommon anomaly, more frequent however than on the left side. Two variations are knows, with or without real ectopy. The radiologist can recognize this abnormal bronchus on the CT slices. Most often it is a non-pathogenic finding (unlike the left-sided anomaly). One of the cases, however, had lung cancer in the segment ventilated by the anomalous right bronchus.