摘要
目的探讨颅咽管瘤非典型MRI表现,以提高对此病的认识。方法回顾性分析4例经手术病理证实的颅咽管瘤的MRI资料。结果4例肿瘤均为囊性:例1肿瘤位于鞍上,瘤内可见脂液平面,脑室、脑池及脑沟内可见大小不等的脂肪小滴;例2肿瘤的大部分位于桥小脑角区,仅小部分位于鞍上,T1WI和T2WI均为高信号,脂肪抑制亦为高信号;例3肿瘤位于鞍上,突向鞍内并延伸至胼胝体压部下方,蝶鞍稍增大,垂体未显示,T1WI和T2WI均为高信号;例4肿瘤位于鞍内及鞍上,蝶鞍扩大,垂体未显示,肿瘤前部T1WI和T2WI均为高信号,后部T1WI信号稍高,T2WI与白质信号相同。结论颅咽管瘤存在方式多种多样,有特征性的MRI表现,也可有非典型MRI表现,肿瘤可向邻近部位延伸,亦可破裂播散至蛛网膜下腔内。囊性颅咽管瘤的信号特点与囊液的成分有关。
Objective To investigate the atypical MRI manifestations of craniopharyngioma and understand this disease further. Methods 4 cases of craniopharyngiomas with MRI manifestation confirmed by operation and pathology,were analyzed retrospectively. Results 4 cases were all cystic tumor. The tumor of case 1 was located in suprasellar region,which had lipid-liquid boundary in the focus,and there were many lipid droplets in cerebral ventricle,sulcus and cistern. The tumor of case 2 showed high signal on T_1WI,T_2WI,and fat-suppression image,most of which was in cerebello pontine angle and only a small part in suprasellar region. The tumor of case 3 accompanied with slightly enlarged sella turcica and invisible pituitary gland,was located in suprasellar region and extended to splenium of corpus callous,which manifested high signal on T_1WI and T_2WI. The tumor of case 4 was in sella turcica and protruded to suprasellar region,the anterior of which showed high signal on T_1WI and T_2WI,while the posterior of the mass manifested little high signal on T_1WI and the same signal as the white matter on T_2WI. Conclusion There are diverse MRI manifestations of craniopharyngioma,specific or non-specific. The tumor can extend to other spots nearby or disrupt into subarachnoid space. MRI signal specialty of cystic craniopharyngioma is related to the contents of the cystic fluid.
出处
《中风与神经疾病杂志》
CAS
CSCD
北大核心
2005年第3期260-262,共3页
Journal of Apoplexy and Nervous Diseases
关键词
颅咽管瘤
MRI
病理
Craniopharyngioma
MRI
Pathology
