Summary Stage 2023: Medulloblastoma

Summary Stage 2018


**Medulloblastoma** C700-C729: 9362, 9470-9472, 9474-9478, 9501-9504, 9508 C700-C722, C724-C729: 9473 C753: 9362 C700-C729, C753 C700 Cerebral meninges C701 Spinal meninges C709 Meninges, NOS C710 Cerebrum C711 Frontal lobe C712 Temporal lobe C713 Parietal lobe C714 Occipital lobe C715 Ventricle, NOS C716 Cerebellum, NOS C717 Brain stem C718 Overlapping lesion of brain C719 Brain, NOS C720 Spinal cord C721 Cauda equina C722 Olfactory nerve C723 Optic nerve C724 Acoustic nerve C725 Cranial nerve, NOS C728 Overlapping lesion of brain and central nervous system C729 Nervous system, NOS C753 Pineal Gland **Note 1:** The following sources were used in the development of this chapter * SEER Extent of Disease 1988: Codes and Coding Instructions (3rd Edition, 1998) ( * SEER Summary Staging Manual-2000: Codes and Coding Instructions ( * Collaborative Stage Data Collection System, version 02.05: * Brain and Spinal Cord, from the AJCC Cancer Staging System Version 9 (2022). Used with permission of the American College of Surgeons, Chicago, Illinois **Note 2:** This is a new Summary Stage chapter for cases diagnosed 2023+. For cases diagnosed prior to 2023+, use the appropriate Summary Stage chapter based on primary site * C700, C710-C719: Summary Stage Chapter *Brain* * C701, C709, C720-C729: Summary Stage Chapter *CNS Other* * C753: Summary Stage Chapter *Intracranial Gland* **Note 3:** Assign code 8 for benign or borderline tumors. **Note 4:** Codes 0, 3, and 4 are not applicable for this chapter.


SS2018 Description
1 Localized only (Localized, NOS) All sites * Single tumor with no invasion or seeding to other structures Confined to site of origin, NOS Localized, NOS
2 Regional, NOS Tumor crosses the midline
7 Distant site(s)/lymph node(s) involved * Distant site(s) (including further contiguous extension) * All Sites * Blood * Bone (including skull) * Bone marrow * "Drop" metastasis * Extra-neural metastasis, NOS * Gross spinal subarachnoid seeing * Intracranial spread beyond primary site * Major blood vessel(s) * Meninges (e.g., dura) * Microscopic confirmation of tumor cells present in CSF by cytology (circulating cells in cerebral spinal fluid) * Multiple/multifocal tumors * Nerves (cranial, NOS) * Tumor invades or encroaches upon ventricular system * Visible metastasis in cervicomedullary (junction) * Brain tumors (C700, C710-C719) * Anterior cranial fossa * Brain stem * Cerebellum * Cerebrum (cerebral hemisphere) * Contralateral hemisphere * Hypothalamus * Middle cranial fossa * Nasal cavity * Nasopharynx * Other direct extension outside CNS * Pallium * Posterior cranial fossa * Posterior pharynx * Suprasellar brain * Tapetum * Thalamus * CNS Tumors (C701, C709, C720-C729) * Adjacent connective tissue * Adjacent muscle * Brain * Eye * Sphenoid and frontal sinuses(skull) * Pineal Gland (C753) * Adjacent connective/soft tissue * Cavernous sinus * Infratentorial and central brain * Distant lymph node(s), NOS * Distant metastasis, NOS * Carcinomatosis * Distant metastasis WITH or WITHOUT distant lymph node(s)
8 Benign or borderline brain
9 Unknown if extension or metastasis
(1) Fritz AG, Ries LAG (eds). **SEER Extent of Disease 1988: Codes and Coding Instructions (3rd Edition, 1998)**, National Cancer Institute, NIH Pub. No. 98-2313, Bethesda, MD, 1998 (2) Young JL Jr, Roffers SD, Ries LAG, Fritz AG, Hurlbut AA (eds.). **SEER Summary Staging Manual-2000: Codes and Coding Instructions**, National Cancer Institute, NIH Pub. No. 01-4969, Bethesda, MD, 2001. (3) Collaborative Stage Work Group of the American Joint Committee on Cancer. **Collaborative Stage Data Collection System User Documentation and Coding Instructions, version 02.05.** American Joint Committee on Cancer (Chicago, IL) (4) Laws, E.R., Curran, W.J., et al. **Brain and Spinal Cord**. In: Amin, M.B., Edge, S.B., Greene, F.L., et al. (Eds.) AJCC Cancer Staging Manual. 8th Ed. New York: Springer; 2017