Final answer:
Brain tumors are abnormal growths in the brain that can be either benign or malignant. Common types of brain tumors include gliomas, meningiomas, and pituitary tumors. The types of brain tumors that are common for different age groups vary.
Step-by-step explanation:
Brain tumors are abnormal growths in the brain that can be either benign (noncancerous) or malignant (cancerous). The pathophysiology of brain tumors involves the uncontrolled division and growth of abnormal cells in the brain. Common types of brain tumors include gliomas, meningiomas, and pituitary tumors.
The types of brain tumors that are common for different age groups vary. In children, the most common types of brain tumors are medulloblastomas, gliomas, and ependymomas. In adults, glioblastomas, meningiomas, and schwannomas are more common. Brain tumors in older adults are often metastatic, meaning they have spread from cancers in other parts of the body.