ON THIS PAGE: You will find some basic information about this disease and the parts of the body it may affect. This is the first page of Cancer.Net’s Guide to Childhood Medulloblastoma. To see other pages, use the menu. Think of that menu as a roadmap to this full guide.
Medulloblastoma is a type of brain tumor. A brain tumor begins when healthy cells in the brain change and grow out of control, forming a mass. A tumor can be cancerous or benign. A cancerous tumor is malignant, meaning it can grow and spread to other parts of the body. A benign tumor means the tumor can grow but will not spread.
The brain and spinal column make up the central nervous system (CNS), where all vital functions are controlled, including thought, speech, and body strength. Medulloblastoma begins in different cells in the cerebellum, which is the back of the brain. The cerebellum controls body movement and coordination.
Looking for More of an Introduction?
If you would like more of an introduction, explore these related items. Please note these links will take you to other sections on Cancer.Net:
ASCO Answers Fact Sheet: Read a 1-page fact sheet  that offers an introduction to CNS tumors. This fact sheet is available as a PDF, so it is easy to print out.
The next section in this guide is Statistics . It helps explain how many children are diagnosed with this disease and general survival rates. Or, use the menu to choose another section to continue reading this guide.