Neoplasms of central nervous system or related structures

**Definition:** A benign or malignant neoplasm that affects the brain, meninges, or spinal cord. Representative examples of primary neoplasms include astrocytoma, oligodendroglioma, ependymoma, and meningioma.

**Exclusions:** - Malignant neoplasm metastasis in brain - Malignant neoplasm metastasis in meninges - Malignant neoplasm metastasis in spinal cord, cranial nerves or paraspinal nerves