“…The differential diagnosis is often challenging and includes other anterior mediastinal masses (hemangioma, lymphangioma), cardiac tumors (fibromas, hemangiomas, rhabdomyomas, rhabdomyosarcomas), and thoracic malformations (congenital cystic adenomatoid malformation, extralobar pulmonary sequestration, and bronchogenic cyst) [5,10,14,16,17]. Successful fetal surgery has been described in cases presenting before 30 weeks of gestation [1][2][3][4][5][11][12][13]. Cesarean delivery after lung maturation is indicated because the increased cardiac compression during vaginal delivery may result in fatal heart compression [8].…”