A 39-year-old woman was admitted to our hospital for a pure ground-glass opacity that had been detected in the right lung during a regular examination. A computed tomography scan showed a pure ground-glass opacity beneath the pleura of the right upper lobe of the lung that had enlarged over time. As a consequence, a lung adenocarcinoma was suspected. Meanwhile, three-dimensional computed tomography scans revealed a tracheal bronchus originating directly from the lateral wall of the trachea. The patient consequently underwent posterior segmental resection and mediastinal lymph node sampling by video-assisted thoracic surgery. During surgery, in addition to the tracheal bronchus, a variable central vein was found entering the left atrium dorsal to the right pulmonary artery trunk. We submit that, to the best of our knowledge, this is the first case of its kind ever reported.