1. By: Anna Gooden

2. Medulloblastoma Medulloblastoma is a type of brain tumor. It is also known as PNET. It occurs in children and teenagers.

3. Medulloblastoma is caused by "stem cells" that have been prevented from dividing and forming into normal cell types. Medulloblastoma has a tendency to spread to other sites in the nervous system and to other body organs. Symptoms of Medulloblastoma are : unsteadiness, morning headaches, vomiting, and frequent falls.

4. Area affected & Who is affected Medulloblastoma usually form in the fourth ventricle between the brainstem and the cerebellum. Medulloblastoma is higher in males (62%) than females (38%). Medulloblastoma and other PNET tumors are more common in younger children than older children.

5. Prognosis and Treatments Available Treatment begins with maximal removal of the tumor, chemotherapy, and radiation. Prognosis is worse if the child is less than 3 years old because it can spread easily threw the nervous system. 40% of Medulloblastoma patients are diagnosed before the age of 5. 31% are between the ages of 5 and 9 18.3% are between the ages of 10 and 14 12.7% are between the ages of 15 and 19

6. The tumor is solid, pink-gray in color The tumor is very cellular It has little cytoplasm Has the tendency to form clusters and rosettes. Websites: http://en.wikipedia.org/wiki/Medulloblastoma www.childhoodbraintumor.org