良性畸胎瘤是较常见的纵隔肿瘤之一，对其影像学特征认识不足常易误漏诊。胸部X线平片，对诊断有很大限度，而CT具有一定的特征性，本文对2例纵隔畸胎瘤进行了总结。1病例报告病例1女，60岁，无明显诱因感觉胸闷，呼吸困难3月余。体检：全身浅表淋巴结不肿大，胸腹部未见异常。 Teratoma is one of the more common mediastinal tumors, the lack of understanding of its imaging features often missed the error diagnosis. Chest X-ray, there is a great limit on the diagnosis, and CT has some characteristics, this article on 2 cases of mediastinal teratoma were summarized. 1 case reported cases 1 female, 60 years old, no obvious incentive to feel chest tightness, dyspnea more than 3 months. Physical examination: systemic superficial lymph nodes did not enlarge, no abnormalities in the chest and abdomen.