头部MRI示硬脑膜异常强化灶，以大脑镰、小脑幕等处为主；
方法总结了大脑镰旁硬膜下水瘤36例，其中外伤33例，非外伤3例。
1·Methods 36 cases of subdural hygroma beside cerebral falx were summarized, 33 cases is traumatic, 3 cases is non-traumatic.
方法总结了大脑镰旁硬膜下水瘤36例，其中外伤33例，非外伤3例。
2·Conclusion the total tumor resection and an effective treatment of the involved sagittal sinus and falx is an important way for preventing tumor recurrence.
结论全切除和有效处理受累大脑镰和矢状窦是防止肿瘤复发的重要手段。
3·Results 15 cases presented crescent-like watery density under the skull, 8 cases presented arc-like watery density beside cerebral falx, while the remaining 5 cases presented both.
结果15例表现为颅骨内板下新月型水样密度影，8例表现为大脑镰旁弧型水样密度影，5例上述两种类型均有表现。