A. Brain Tumors
1. Neuroepithelial tissue (e.g., astrocytoma, oligodendroglioma, embryonal tumors)
2. Cranial and spinal nerves (e.g., schwannoma, neurofibroma)
3. Meningeal and related tissues
4. Hematopoietic (e.g., lymphomas, hemangioblastomas)
5. Pituitary
6. Metastatic
7. Other (e.g., craniopharyngioma, pineal)
B. Spinal Cord Tumors
1. Primary (e.g., astrocytoma, ependymoma, meningioma)
2. Metastatic
3. Neurofibroma
