Brain tumors can start at any age, although they are most commonly diagnosed in children and adults over the age of 65. The most common type of brain tumor in children is a tumor of the CNS (central nervous system), which can occur at any age from infancy to adulthood. In adults, the most common types of brain tumors are gliomas, which can occur in any age group, as well as meningiomas, which are more common in older adults.
In children, the majority of brain tumors are found in the cerebellum and brainstem. These tumors can be benign (non-cancerous) or malignant (cancerous). The most common types of brain tumors in children are medulloblastomas, which are malignant tumors typically found in the cerebellum, and brainstem gliomas, which are slow-growing tumors that can occur anywhere in the brain.
In adults, the most common types of brain tumors are gliomas, which are tumors that start in the glial cells of the brain. Gliomas can occur in any age group, but are most common in adults over the age of 65. Meningiomas, which are tumors of the meninges (the layers of tissue that surround the brain and spinal cord) are also common in adults, and are more likely to occur in older adults.
Overall, brain tumors can occur at any age, but certain types of tumors are more common in different age groups. Children are more likely to have tumors of the CNS, while adults are more likely to have gliomas or meningiomas.