Our brain is highly packed and well organized organ. The brain controls the entire functioning of the body. The human brain is divided into seven different parts. Each part plays its own role and perform its own function for the proper working of the human body. The cells in a human body continue to divide as we grow old. However, when we reach a certain age some cells stop dividing unless there is a need to repair or replace the old cells. Sometimes, due to mutations, the cells keep on dividing, which then turns into a tumor. An abnormal growth in the brain cells leads to a brain tumor. A brain tumor can occur in anyone. There are almost more than 120 types of brain tumors. 
The brain tumors can be classified into two forms on the basis of its nature:
These brain tumors are not as harmful as the other type, because they have a low proliferating rate. They don’t invade tissues distantly, the surrounding areas. These tumors do not cause cancer, however, these might cause problems and effect the proper functioning of the human body, because an increase in the size of any area of the brain causes pressure on the adjacent side.