大脑半球畸胎瘤极少见,文献报道过2例,CT均有特征性改变,本文2例术前CT缺乏特征性征象误诊胶质瘤和转移瘤,现报告如下: 例1 男性,13岁,头痛伴右侧肢体无力2周就诊。神经系统检查:口角左歪,右侧上下肢肌力Ⅱ级,右膝反射亢进。CT检查:增强前(图1)左侧基底节区见高密度肿块,约4.5×3.9cm,类圆形, The hemispheric teratoma is very rare in the literature, 2 cases have been reported in the literature, CT has characteristic changes, this article 2 cases of pre-operative CT characteristics of misdiagnosed gliomas and metastases, the report is as follows: 1 male, 13 years old Headache with right limb weakness 2 weeks treatment. Nervous system examination: left crooked mouth, right upper and lower extremity muscle strength Ⅱ, right knee reflex hyperthyroidism. CT examination: before enhancement (Figure 1) the left basal ganglia see high-density mass, about 4.5 × 3.9cm, round,