【摘要】 目的 探讨小脑实质型血管网织细胞瘤的MR及MRA的特点。方法 收集经手术病理证实的实质型血管网织细胞瘤18例,均行MRI平扫及Gd-DTPA增强扫描,8例行MRA扫描,2例行DSA检查。结果 18例实质型血管网织细胞瘤均位于后颅窝,2例多发。肿瘤表现为均匀或不均匀稍长T₁及稍长T₂信号,除2例轻度均匀强化外,其余均匀或不均匀强化明显,14例可见小囊变区,16例病灶实质部分见血管流空信号,2例与邻近脑膜关系密切,MRA均显示瘤内或瘤周多发、增粗、迂曲的动脉血管及“肿瘤染色”。结论 利用MRI结合MRA可较明确诊断小脑实质型血管网织细胞瘤,不典型者需与脑膜瘤、星形细胞瘤、髓母细胞瘤等鉴别。更多还原

【Abstract】 Objective To explore MR imaging and MR angiography characteristics of solid hemangioblastomas of the cerebellum.Methods 18 cases with solid hemangioblastoma proved by surgery and pathology underwent plain and enhanced MR scans,among them,8 underwent MRA scans and 2 underwent DSA examinations.Results All cases were located in posterior cranial fossa and 2 cases showed multiple nidus.The tumors showed sligh long T₁ and long T₂ signal intensity.The obvious homogeneous or unhomogeneous enhancement was seen in all tumors except in 2 cases which showed slight homogeneous enhancement.The small cystic degeneration inside the tumors in 14 and blood flow void signals within solid neoplastic components in 16 were seen.2 tumors were of closed with surrounding meninges.MRA in all cases showed multiple thickening anfractuous arteries within or arround the tumors and "tumor stain".Conclusion MRI in combination with MRA can considerably identify solid hemangioblastomas in the cerebellum,but the atypical cases should be differentiated from meningioma,astrocytoma,medulloblastoma,and so on.更多还原