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.