Cerebellar tumors account for 5% to 15% of all brain tumors. Tumors can be both benign and malignant in nature. Benign tumors grow slowly, have clear boundaries and rarely spread. Although the tumor consists of benign cells, it is life-threatening due to the compression of adjacent areas of the brain.
The malignant tumor grows rapidly, has blurred borders and spreads rapidly to neighboring areas of the brain. Although malignant tumors are sometimes called brain cancers, they do not fall under the definition of cancer because they do not spread to organs outside the brain and spinal cord.