颅内脂肪瘤的CT和MRI诊断

Diagnosis Of CT And MRI In Intracranial Lipoma

目的评价CT和MRI在颅内脂肪瘤诊断中的价值。方法对经CT及MRI诊断并经手术病理证实的10例颅内脂肪瘤进行对照总结。结果肿瘤位于胼胝体8例，第三脑室、外侧裂各1例。其中3例胼胝体脂肪瘤同时发生双侧脑室脉络丛脉脂肪瘤，罕见。CT表现均匀低密度7例，不均匀低密度3例，肿瘤伴钙化3例。MRI检查3例在TIWⅠ及T2WⅠ图像均为高信号。结论研对颅内胼胝体等部位显示形态各异低密度，CT值在0以下，或伴钙化肿块；MRI在T1WⅠ和T2WⅠ图像显示与颅外脂肪相同的高信号肿块，可作为CT、MRI诊断颅内脂肪瘤的重要表现。

To evaluate the value of cr and MRI in the diagnosis of intracrmial lipoma. Method 10 cases of intrar anial lipom were analyzed in comparing their CT and MRI manifestations with their operating pathology. ResuIt TUrnors are located in corpus callosum in 8 cases, in third ventricle of cerebrum in 1 and in lateral sulcus in 1. 3 cases of lipoma in corpus callosum are accompanied by lipomas in choroid plexus of bilateral ventricles, rarely. Their CT manifestations are even low density area in 7 cases, not even in 3 and calcilied tumors in 3. Tumnrs in 3 cases examined with MRI are high intensive signal in T1W Ⅰ and T2W Ⅰ.Conclusion:Lipomas may be diagnosed with CT manifestations as different-shape low density area in corpus callosum, negaive CT value or accompanytng tumor calcified, and MRI manifestations as high intensive signal in T1W Ⅰand T2W Ⅰ.