A large ruptured mediastinal cystic teratoma

Area of Science:

• Thoracic Surgery
• Pathology
• Oncology

Background:

• Mature teratomas are germ cell tumors commonly found in the anterior mediastinum.
• They are typically benign and most frequently occur in young adults.
• Rupture of mediastinal teratomas is rare but can be life-threatening.

Purpose of the Study:

• To report a rare case of a large, symptomatic mature teratoma in the anterior mediastinum.
• To discuss the diagnostic and therapeutic approach for mediastinal teratomas.
• To emphasize the favorable prognosis following surgical management.

Main Methods:

• A 51-year-old woman with cough, chest pain, and dyspnea underwent imaging (chest X-ray, CT scan).
• Diagnostic thoracentesis was performed, followed by left thoracotomy for mass resection.
• Pathologic examination confirmed a mature teratoma with diverse tissue components.

Main Results:

• Imaging revealed a large, irregular, fluid-filled mass in the left hemithorax with mediastinal shift and pleural effusion.
• Pleural fluid was exudative, without malignant cells.
• Pathology confirmed a 20 cm mature teratoma involving the anterior mediastinum, pericardium, pleura, and lung.

Conclusions:

• Mature teratomas, though rare, can present as large symptomatic masses in the anterior mediastinum.
• Surgical resection is the primary treatment, offering an excellent prognosis.
• Prompt diagnosis and surgical intervention are crucial for managing mediastinal teratomas.