Bronchogenic cysts are congenital mediastinal tumors. The article describes the case of a 17-year-old asymptomatic woman, where the cyst was accidentally discovered during a routine examination. CT imaging revealed gross hemorrhage on the surface of the cyst, which was directly adjacent to the descending aorta and resembled pulmonary sequestration. After preoperative vascular assessment, the cyst was successfully removed with a linear cutting stapler, minimizing the risk of bleeding. During the operation, partial hypoplasia of the left pericardium was found in connection with the cyst. Pericardial suture was not performed due to limited pleural space. The article emphasizes the importance of preoperative vascular evaluation for the treatment of such cysts.