A brain tumor or intracranial neoplasm occurs when abnormal cells make up the brain. Glioma is a type of tumor that starts in the brain or spinal cord and raises glial cells, causing gliomas. These cells are responsible for the large intestinal tract in the brain. These cells are bad in nature. Genetic disorders such as neurofibromatosis and tuberous sclerosis known as predispose to their growth and development. Gliomas are associated with electromagnetic radiation and most glioblastomas are infected with cytomegalovirus, which accelerates the growth of tumors. Other genetic disorders also increase the risk of developing gliomas tumors in children but are rare in adults. Tumor growth is more mature and the final death occurs within 2 to 3 years.