|A brain tumor or intracranial neoplasm occurs when abnormal cells form within the brain.
Glioma is a type of tumor that starts in brain or spine and raises the glial cells, which causes the gliomas. These cells are mostly responsible in making the tumors in brain. These cells are malignant in nature. Hereditary genetic disorders such as neurofibromatosis and tuberous sclerosis complex are known to predispose to their development and existance. Gliomas have been correlated to the electromagnetic radiation and most of the glioblastomas are infected with cytomegalovirus, which speeds the development of tumors. Some genetic disorders also increase the risk of development of gliomas tumors in children but rarely in adults. The tumor growth exist for more growth and final death occurs within 2 to 3 years.
The impact factor of journal provides quantitative assessment tool for grading, evaluating, sorting and comparing journals of similar kind. It reflects the average number of citations to recent articles published in science and social science journals in a particular year or period, and is frequently used as a proxy for the relative importance of a journal within its field. It is first devised by Eugene Garfield, the founder of the Institute for Scientific Information.The impact factor of a journal is evaluated by dividing the number of current year citations to the source items published in that journal during the previous two years.