颅咽管瘤的MRI诊断

目的：探讨MRI在诊断颅咽管瘤中的作用。材料和方法：取70例(男37，女33，平均年龄33．2岁，平均病程2年半)经手术和病理证实的颅咽管瘤患者术前MRI检查资料，其中25例加作Gd—DTPA增强MRI扫描，分析MRI表现特征及找出诊断与鉴别诊断要点。结果：本组术前MRI诊断定位正确率为：100％，定性正确率为80%，误诊率为20％，其MRI特征性表现为：(1)肿瘤形态以结节状．分叶状为主(本组为67％)，边界清楚．(2)肿囊信号多不均匀(本组为65％)，表现复杂．(3)Gd—DTPA增强多数肿瘤呈不均匀强化(本组56%)。结论：：MRI的多轴位成像及Gd—DTPA应用有助于颅咽管瘤的诊断与鉴别诊断．

MRI Diagnosis of Craniopharyngioma

To investigate the role of MRI in diagnosis of craniopharyngioma. Materials and Methods:Seventy cases of craniopharyngioma (Male/female was 37/33 with average age 33.2 years and the average history was 2.5 years) proved by operation and pathology were examined by MRI before operation. Gd-DTPA enhancement was carried out in 25 cases. The diagnosis and differential diagnostic keys were established by analysis of MRI feature. Results:The localization and qualification rates were 100% and 80%,respectively with misdiagnosised rate was 20%. The characteristic MRI appearances of craniopharyngioma are as follows :(1) The tumor is nodular and lobular in shape with clear margin. (2) The tumor has hetrogeneous signal intensity.(3) Inhomogeneous Gd-DTPA enhancement in most of the tumors.Conclusion:Multiplanar imaging and GdDTPA enhancement in MRI are helpful in diagnosis and differential diagnosis of craniopharyngioma.