Primary mediastinal germ-cell tumors (GCTs) without gonadal involvement are rare and can be divided into benign mature teratoma and malignant seminoma or nonseminoma.

摘要无生殖腺体侵犯之原发腔生殖芽细胞为罕见之，分为良成熟畸胎及包含精细胞和非精细胞在内的恶。