Medulloblastoma is a primary central nervous system CNS tumor. This means it begins in the brain or spinal cord. To get an accurate diagnosis , a piece of tumor tissue will be removed during surgery, if possible. A neuropathologist should then review the tumor tissue. Medulloblastomas are all classified as Grade IV tumors. This means they are malignant cancerous and fast-growing.
Adult Central Nervous System Tumors Treatment (PDQ®)–Patient Version
Medulloblastoma - Overview - Mayo Clinic
Medulloblastoma is a common type of primary brain cancer in children. It originates in the part of the brain that is towards the back and the bottom, on the floor of the skull, in the cerebellum , or posterior fossa. The brain is divided into two main parts, the larger cerebrum on top and the smaller cerebellum below towards the back. They are separated by a membrane called the tentorium.
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Medulloblastoma Diagnosis and Treatment
Pituitary gland and hypothalamus: The pituitary is a small gland at the base of the brain. It is connected to a part of the brain called the hypothalamus. They work together to make hormones that help regulate the activity of several other glands in the body.
The cerebellum is located in the posterior fossa along with the fourth ventricle and brain stem. Approximately 15 to 20 percent of tumors arise in the posterior fossa, according to New York Presbyterian Hospital 1 2. The cerebellum controls intricate muscular coordination such as walking and speech in conjunction with the thalamus.