CAJ | 학술논문

目的：探讨后颅窝髓母细胞瘤（medulloblastoma，MB）的MRI表现，以提高诊断准确率。方法：回顾性分析经手术病理证实的26例MB的MRI及临床资料，并将MRI表现与病理进行对照研究，患者均行MRI平扫、增强扫描及DWI检查。结果：26例均为单发病灶，其中15例位于第四脑室内（占58%），7例位于小脑蚓部（占27%），4例位于小脑半球（占15%）。肿瘤在T1WI上呈等至低信号，T2WI呈稍高或高信号，DWI上肿瘤实性成分呈稍高、高及明显高信号，ADC图均为低信号。12例病灶内可见囊变、坏死，囊变坏死区与脑脊液信号相近，1例合并出血。增强扫描肿瘤实质成分强化特征不一，呈轻度至明显强化。5例沿脑脊液播散。结论：常规MRI结合DWI及ADC图对MB的诊断、鉴别诊断，以及沿脑脊液种植转移的诊断具有重要价值。
목적：탐토후로와수모세포류（medulloblastoma，MB）적MRI표현，이제고진단준학솔。방법：회고성분석경수술병리증실적26례MB적MRI급림상자료，병장MRI표현여병리진행대조연구，환자균행MRI평소、증강소묘급DWI검사。결과：26례균위단발병조，기중15례위우제사뇌실내（점58%），7례위우소뇌인부（점27%），4례위우소뇌반구（점15%）。종류재T1WI상정등지저신호，T2WI정초고혹고신호，DWI상종류실성성분정초고、고급명현고신호，ADC도균위저신호。12례병조내가견낭변、배사，낭변배사구여뇌척액신호상근，1례합병출혈。증강소묘종류실질성분강화특정불일，정경도지명현강화。5례연뇌척액파산。결론：상규MRI결합DWI급ADC도대MB적진단、감별진단，이급연뇌척액충식전이적진단구유중요개치。
Objective:To explore MRI manifestation of medulloblastomas (MB). Methods:26 cases with MB proved by pathol-ogy were reviewed,including MR imaging and clinical data. All patients were examined with conventional MRI,enhanced MRI and DWI. Results:26 cases with MB were single lesion. 15 lesions (58%) were located in the fourth ventricle,7 cases (27%) in cerebellar vermis,4 cases (15%) in cerebellar hemisphere. Most tumors demonstrated hypo- or iso-intense on T1WI and mild to significant hyper-intense on T2WI,DWI of the solid component showed slightly high,high and obviously high signal,ADC maps were all low signal. Cyst degeneration or necrosis was seen in the 12 lesions,while one lesion had bleeding with the tu-mor. 5 cases spread into subarachnoid space. Conclusions:Conventional MRI combined with DWI and ADC has important value in diagnosis and differential diagnosis of medulloblastoma,and has important diagnostic value of metastatic carcinoma.