Mature teratoma of the mediastinum poses a significant surgical challenge due to close vicinity to vital structures causing respiratory insufficiency or hemodynamic compromise. While the malignant variety of germ cell tumors (GCT) generally present with florid symptoms, benign teratomas are detected incidentally on imaging. Large teratomas presenting as mediastinal mass syndrome have additional difficulty in airway access. Herein, we report a case of a 40-year-old-female with no significant comorbidities presenting with rapidly progressing symptoms of chest pain, dyspnea, and superior vena cava (SVC) compression. Computed tomography (CT) scan of the neck and chest confirmed a large cystic lesion with marked compression of the great veins in the neck, arch of aorta, trachea, and proximal bronchial divisions. Airway access intraoperatively was done by awake fiberoptic bronchoscopy. However, sudden hypoxia and hemodynamic deterioration warranted emergency sternotomy. Adequate preoperative preparation, as well as standby extracorporeal circulatory support, led to successful and complete excision of the tumor. The patient had an uneventful recovery and extubated in the intensive care unit (ICU) the next day. Histopathology of the mass confirmed to be mature benign cystic teratoma. At six-month follow-up, the patient was completely asymptomatic without any complications. The impact of intraoperative catastrophe on the healthcare team can be immense. Inability to achieve a secure airway and the resultant hypoxia can result in permanent neurological damage. A multidisciplinary approach leading to adequate preoperative assessment, intraoperative preparedness for an emergency sternotomy with standby extracorporeal circulatory support due to the risk of mediastinal mass syndrome, were key features in the successful management of the patient.
Keywords: extracorporeal circulatory support; germ cell tumor; mature teratoma; mediastinum; superior vena cava syndrome.