En bloc resection of an extremely giant mediastinal immature teratoma with somatic‐type malignancy: A case report with a brief review of the literature

Abstract

Key Clinical MessagePrimary mediastinum immature teratoma with somatic‐type malignant transformation (SM) is extremely rare, and the clinical prognosis is poor. Immature teratoma with SM is difficult to eradicate by chemotherapy due to poor sensitivity; therefore, surgical resection is recommended whenever possible because it may offer better survival.