成人四脑室脉络膜丛乳头状癌少见,我们遇到1例,现报告如下: 男,29岁,头痛头晕2个月。CT检查发现后颅窝内一混杂密度的肿块,大小约3×2.5,边界不清,四室以上脑室扩大,注射造影剂后肿块明显强化(图1,2)。MRI扫描,肿块位于四脑室内,T_1WI呈稍低信号,T_2WI为以高信号为主的混杂信号,注射GDTP后肿块显著强化(图3,4)。 Adult four ventricle choroid plexus papillary rare, we encountered 1 case, are as follows: Male, 29 years old, headache, dizziness, 2 months. CT examination found a heterogeneous mass in the posterior fossa of the tumor, the size of about 3 × 2.5, the boundary is unclear, enlarged ventricles more than four rooms, injection of contrast agent significantly enhanced mass (Figure 1,2). MRI scans showed that the tumor was located in the fourth ventricle, T_1WI was a little lower signal, T_2WI was a mixed signal mainly composed of high signal, and the tumor was significantly enhanced after GDTP injection (Figure 3 and 4).