Primary mediastinal malignant germ cell tumors are rare and different from gonadal germ cell tumors in clinical characteristics,diagnosis,therapy,and prognosis.

• 原发性纵隔恶性生殖细胞肿瘤临床少见,与相应原发性性腺生殖细胞肿瘤的临床表现、诊断、治疗及预后均不相同。