脑肿瘤脊髓肿瘤CTMRI.ppt

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1、脑肿瘤、脊髓肿瘤CT、MRTumors肿瘤lGliomas 胶质瘤lMeningiomas 脑膜瘤lPituitary tumor 垂体瘤lAcoustic neurinoma 听神经瘤lCraniopharyngioma 颅咽管瘤lMetastatic tumors 转移瘤lEtc 等等Gliomas胶质瘤Astrocytic tumors Oligodendroglial tumors Ependymal cell tumors Mixed gliomas AstrocytomaLow-gradeAstrocytomaGBMGBMGBMOligodendrogliomaOligodendr

2、ogliomaOligodendrogliomaEpendymomaEpendymomaEpendymomaDiagnosis and differential diagnosis for glioma胶质瘤的诊断和鉴别诊断Meningioma 脑膜瘤lMeningiomas represent 15%of all brain tumorslMeningiomas are more common in women than in men,with a male-to-female ratio of 1:2lMeningiomas have a predilection to occur fro

3、m the third to sixth decades of life,with a peak incidence occurring in individuals aged approximately 45 years.MeningiomaMeningiomaMeningiomaMeningiomaMeningiomaPituitary Adenoma 垂体瘤lTumour arising from the cells of the pituitary gland.Microadenoma(10 mm)lPituitary adenomas are usually benign tumou

4、rs,and pituitary carcinomas are very rare.Pituitary Adenoma垂体瘤lCoronal and sagittal thin slice T1-weighted images,without and with contrast enhancement.lMicroadenomas are usually iso-hypointense and are particularly well seen after gadolinium injection when the pituitary gland enhances homogeneously

5、.lThe direction of growth of macroadenoma is well appreciated and involvement of chiasm and cavernous sinus may be detected.Microadenoma,pituitaryMicroadenoma,pituitaryDelay a few minutesAcoustic neurinoma 听神经瘤lPlain film lCT lMRICraniopharyngioma 颅咽管瘤lCraniopharyngiomas are typically found in the f

6、irst two decades of life and usually have both solid and cystic components.lCyst content may have different appearances but usually appears as machine-oil and contains characteristic suspended cholesterol crystals.lCalcifications are present in the vast majority of these tumours.Metastatic tumors 转移

7、瘤lSex:primary tumor.Lung cancer is the most common source of metastases in male patients,while breast cancer is the most common source in female patients.lAge:primary systemic tumors.Most brain metastases occur in patients aged 35-70 years.lCTlMRISpinal cord 脊髓lExamniation methodslFindings and analysis