论文部分内容阅读
目的 分析多中心性颅咽管瘤的MRI表现 ,提高对本病的认识。方法 4例经手术及病理证实的多中心性颅咽管瘤 ,术前行MRI平扫及Gd -DTPA增强后MRI成像 ,其中 2例行PDWI成像。结果 多中心性颅咽管瘤的MRI表现为鞍区或鞍上区以实性为主的囊实性中心病灶 ,同时在双颞叶、前颅窝底、三脑室前部、桥前池内或尾状核可见多个大小不一的囊性病灶。囊实性病灶在T1WI及T2 WI上分别为低等及高低混杂信号 ;囊性病灶平扫T1WI表现为变化多样的高低信号 ,T2 WI表现为高信号 ,PDWI表现为等及高信号。强化后囊性病灶表现为环状薄壁强化 ,实质性病灶为均匀强化。结论 多中心性颅咽管瘤的生长表现为以鞍区或鞍上区为中心的多点起源的生长特点 ,肿瘤的信号特点与病灶囊实性比例及囊液的成分有关
Objective To analyze the MRI findings of multicentric craniopharyngioma and to improve the understanding of the disease. Methods Four cases of multi-center craniopharyngioma confirmed by operation and pathology were examined by MRI before and after Gd-DTPA enhancement. Among them, PDWI imaging was performed in 2 cases. Results The MRI manifestations of multi-center craniopharyngioma were solid-centered cystic solid lesions in the saddle or supraspinatus. At the same time, in the bilateral temporal lobe, the anterior cranial fossa, the anterior part of the third ventricle, Caudate nucleus can see a number of cystic lesions of different sizes. The cystic solid lesions on T1WI and T2WI were low and high mixed signals respectively. Cystic lesions showed varying levels of T1WI, T2WI showed high signal and PDWI showed high signal. Enhanced posterior cystic lesions showed ring-shaped thin-walled enhancement, substantial enhancement of the lesion. Conclusions The growth of multi-center craniopharyngiomas is characterized by multi-point origin with saddle area or suprasellar area as the center. The signal characteristics of the tumor are related to the cystic solidity ratio and the composition of cystic fluid