human
I have a friend who has just been diagnosed with a brain tumor. What is a brain tumor and what are the different types?
assistant
Brain tumors are abnormal growths of tissue that can develop in any part of the brain. There are many different types of brain tumors, including gliomas, meningiomas, schwannomas, pituitary adenomas, and metastatic cancers. Gliomas are the most common type of brain tumor and are usually found in the frontal lobe or temporal lobe of the brain. Meningiomas grow on the surface of the brain and are usually found near the base of the skull. Schwannomas are slow-growing tumors that occur in the nerves of the spinal cord. Pituitary adenomas are noncancerous tumors that grow from the pituitary gland at the base of the brain. Metastatic cancer is a form of cancer that spreads to other parts of the body through the bloodstream or lymphatic system.