性腺外畸胎瘤大多发生在骶尾部、腹膜后、纵隔、口底、松果体区等人体中线部位,发生在肺内的畸胎瘤(intrapulmonary teratoma,IPT)罕见,1839年Mohr首例报道。该病术前大多误诊。有鉴于此,本文对IPT的发病率、临床X线表现、X线鉴别诊断等,结合有关文献和1例误诊病例进行讨论,借 Most of the extragonadal teratomas occur in the midline of the human body, such as the sacrococcygeal, retroperitoneal, mediastinum, mouth bottom and pineal region. The intrapulmonary teratoma (IPT) occurs rarely in the lung. The first case of Mohr in 1839 . Most of the misdiagnosis of the disease before surgery. In view of this, this article on the incidence of IPT, clinical X-ray findings, X-ray differential diagnosis, combined with the literature and a case of misdiagnosed discussion