EOD Primary Tumor

Notes

**Note 1:** Mucosal melanomas occur throughout the mucosa of the lip and oral cavity (C000-C148) and the nasal cavity (C300), accessory sinuses (C310-C319) and the larynx (C320-C329). For a more detailed description of anatomy, refer to the appropriate EOD schema based on the location of the mucosal melanoma. **Note 2:** Code 100 for localized tumors when no other information is available or for extension involving the mucosa only of adjacent sites. **Note 3:** Extension involving the deeper tissues of the primary or adjacent sites are recorded in codes 300, 500 or 600. Code 300 when the only information available is “deep tissue involvement.” **Note 4:** Code 700 (Moderately advanced disease, NOS) only when specific information about moderately advanced disease is not available (see codes 300 and 500).
Code Description SS2018 T
000 In situ: noninvasive, intraepithelial IS
100 Any size tumor or thickness - Mucosa WITH or WITHOUT soft tissue (immediately underlying) - Confined to site of origin, NOS - Localized, NOS L
300 Deep soft tissue involvement Overlying skin RE
500 Extension to other regional sites/structures WITHOUT further extension to any sites/structures considered very advanced disease (see code 600) Bone Cartilage Deep extrinsic muscle of tongue - Genioglossus - Hyoglossus - Palatoglossus - Styloglossus D
600 Brain Carotid artery Dura Lower cranial nerves (IX, X, XI, XII) Masticator space Mediastinal structures Prevertebral space Skull base Very advanced disease, NOS Further contiguous extension D
700 Moderately advanced disease, NOS D
999 Unknown; extension not stated Primary tumor cannot be assessed Not documented in patient record Death Certificate Only U
(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) Gress, D.M., Edge, S.B., Gershenwald, J.E., et al. **Principles of Cancer Staging**. In: Amin, M.B., Edge, S.B., Greene, F.L., et al. (Eds.) AJCC Cancer Staging Manual. 8th Ed. New York: Springer; 2017: 3-30 (5) Lydiatt, W.M., Patel, S.G., Shah, J.P., et al. **Staging Head and Neck Cancers**. In: Amin, M.B., Edge, S.B., Greene, F.L., et al. (Eds.) AJCC Cancer Staging Manual. 8th Ed. New York: Springer; 2017: 55-65 (6) Lydiatt, W.M., Brandwein-Gensler, M., Shah, J.P., et al. **Mucosal Melanoma of the Head and Neck**. In: Amin, M.B., Edge, S.B., Greene, F.L., et al. (Eds.) AJCC Cancer Staging Manual. 8th Ed. New York: Springer; 2017: 163-169