原发性颅内肿瘤的总发生率每年都在呈上升的趋势。其中有绝大多数的肿瘤是良性的。成人以幕上肿瘤为最常见如星形细胞瘤,垂体腺瘤,继发性癌和脑膜瘤。儿童则以幕下肿瘤最常见的:如星形细胞瘤,髓母细胞瘤和室管膜瘤。1临床特征:临床症状通常呈进展起病。患者可在良性肿瘤多年后或有高度恶性的肿瘤数天后开始出现。癫痫发作有时可能是多年中唯一的症状。偶尔出现缺暂性神经功能障 The overall incidence of primary intracranial tumors is on an upward trend every year. The vast majority of the tumors are benign. The most common supratentorial tumors in adults are astrocytomas, pituitary adenomas, secondary cancers, and meningioma. Children under the curtain of the most common tumor: astrocytoma, medulloblastoma and ependymoma. 1 Clinical features: clinical symptoms usually progress onset. Patients may start to appear after years of benign tumors or several days after having a highly malignant tumor. Seizures can sometimes be the only symptom of many years. Occasional transient neurological dysfunction