EOD Primary Tumor
Notes
**Note 1:** Mucosal melanomas occur throughout the mucosa of the lip and oral cavity (C003-C005, C008-C069, C090-C148) and the nasal cavity and middle ear (C300-C301), 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
