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在美国成人每年脑瘤的新发生数约35000人,这些脑瘤被分为二类:即原发于脑实质和脑膜的肿瘤以及起源于身体其它脏器的转移性脑瘤.每年死于恶性胶质瘤占癌症死亡人数的2.5％,且是15至34岁人群死于癌症的第二位原因.原发性脑瘤形成与环境因素之间无必然联系,但头部受到放射线或被某些化学物质侵袭,有可能使星形细胞瘤和脑膜瘤发生率增加,头颅外伤也可能诱发脑膜瘤。原发性脑瘤患者16％有癌症家族史。
In the United States, the annual number of new brain tumors in adults is about 35,000. The brain tumors are divided into two categories: tumors that originate in the parenchyma and the meninges, and metastatic brain tumors that originate in other organs of the body. Glioma accounts for 2.5% of cancer deaths and is the second leading cause of cancer death in people aged 15 to 34. Primary brain tumor formation is not necessarily related to environmental factors, but the head is exposed to radiation or to a The invasion of some chemicals may increase the incidence of astrocytomas and meningiomas, and cranial trauma may also induce meningioma. 16% of patients with primary brain tumors have a family history of cancer.