• A brain tumor is a cancerous or a non-cancerous growth of cells in the brain. This growth of abnormal cells can take place in any part of the brain or it can happen in any other body part and spread to the brain. Primary brain tumours are named after the brain tissue type from where cancer develops. Different names and types of brain cancers reflect the different cells in the brain that can become cancerous. Although benign or non-cancerous, tumours can affect the brain functioning, and the grade of cancer determines the severity. 
• A benign tumour does not invade the surrounding tissues or spread to other areas. It is the cancerous or malignant tumours that take the nutrients, blood, and space of the healthy cells, and can also spread to other parts of the body. Common brain tumours are gliomas, meningiomas, pituitary adenomas, vestibular schwannomas, and primitive neuroectodermal tumours (medulloblastomas).

Targeted drug treatment blocks specific abnormalities, leading to cancer cell death. This treatment has fewer side effects than other treatment modalities such as chemotherapy and radiation.