Large Intrathoracic Teratomas in Neonates: Surgical Considerations

We report the case of 3 mediastinal teratomas, 1 intrapericardial immature and 2 mediastinal grade 0, diagnosed in the 38 th week of gestation (intrapericardial immature) in the last stage of pregnancy (mature mediastinal). The surgical resection of the masses was successfully undertaken shortly after birth. The histological description of tumor after excision has reported immature multicystic teratoma Grade 2 of 3, with immature neural tissue and without yolk sac tumor cells (for the intrapericardial case) and mature tissue grade 0 large masses, with all tissues represented at histology (for the extrapericardial case). All neonates showed a favorable postoperative course after excision.