What are the common causes of brain tumors?

1. physical factors: after several years of radiotherapy for brain tumors, tumors of other properties appear in the irradiation area, which is one of the pathogenic factors of brain tumors. Animal experiments have found that radiation can change tissues (canceration). The mechanism is that radiation mutates the oncogene of intracranial fibroblasts or meningeal endothelial cells, leading to cell canceration.

2. Chemical factors: Animal experiments have confirmed that various chemicals are the pathogenic factors of brain tumors (various gliomas, meningiomas, sarcomas, epithelial cancers, pituitary adenomas, etc.). ), and common anthracene compounds, such as methyl cholanthrene, diphenyl anthracene, benzoratio, etc.

3. Congenital factors: During embryonic development, primitive cells or tissues remain ectopic in the cranial cavity, and have the function of differentiation and proliferation under certain conditions, which can develop into the pathogenesis of congenital brain tumors. This kind of tumor grows slowly and is mostly benign, such as craniopharyngioma, lipoma and glial cyst.

4. Genetic factors: human genetic defects or mutations can form brain tumors. Multiple neurofibroma is the most typical representative of the inheritance of nervous system tumors, and it is an autosomal dominant genetic tumor. About half of the patients have a family history.