EOD Primary Tumor

Notes

**Note 1:** Impaired vocal cord mobility may be described as vocal cord paresis, and may suggest invasion of intrinsic laryngeal muscle. Fixation of the vocal cord maybe described as immobility of the arytenoids noted on endoscopy, paralysis of the vocal cords, or deviation of larynx to the fixed side. **Note 2:** Code 100 for localized tumor only if no information is available to identify further extension.
Code Description SS2018 T
000 In situ, intraepithelial, noninvasive IS
100 Involvement adjacent regions(s) of larynx - WITH normal or impaired mobility + Glottis + Supraglottis Tumor limited to larynx with vocal cord fixation Confined to larynx, NOS Localized, NOS L
200 Base of tongue Hypopharynx, NOS Paraglottic space Postcricoid area Pre-epiglottic tissues Pyriform sinus (pyriform fossa) Thyroid cartilage (inner cortex) Vallecula RE
700 Carotid artery (encased) Cricoid cartilage Esophagus Extrinsic muscle(s) of tongue - Genioglossus - Geniohyoid - Hyoglossus - Mylohyoid - Palatoglossus - Styloglossus Mediastinal structure(s) Oropharynx Prevertebral space Skin Soft tissues of neck Strap muscle(s) - Omohyoid - Sternohyoid - Sternothyroid - Thyrohyoid Thyroid cartilage (outer cortex, NOS) Thyroid gland Trachea Further contiguous extension D
800 No evidence of primary tumor U
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) Patel, S.G., Lydiatt, W.M., Shah, J.P., et al. **Larynx**. In: Amin, M.B., Edge, S.B., Greene, F.L., et al. (Eds.) AJCC Cancer Staging Manual. 8th Ed. New York: Springer; 2017: 149-161