Are there different kinds of brain tumors?

Yes, many! There are numerous types of primary brain tumors. Som arise from various cells of the brain , eg Astrocytomas, oligodendrogliomas, medulloblastoma, pituitary Adenomas, hemangioblastoma, to name a few. Other tumors arise from the covering of the brain (meningioma, hemangiopericytoma). Some tumors start elsewhere but end up in the brain (leukemia, metastatic carcinoma). All are very different!