Keywords: Chamberlain procedure; anterior mediastinal mass; cardiopulmonary bypass; chemotherapy; communication; computed axial tomography; coughing; dexmedotomidine; great vessels; heart chambers; hemodynamic compromise; ketamine; lymphoma; multidisciplinary team; perioperative planning; pulmonary artery; rigid bronchoscopy; superior vena cava; tracheal compression; transesophageal echocardiography.