EOD Primary Tumor

Notes

**Note:** Left and right extremities (e.g. arm, leg) are counted as separate body regions.

Code	Description	SS2018 T
100	Solitary lesion Solitary skin involvement	L
200	Regional skin involvement Multiple lesions confined to one or two contiguous body regions	RE
400	Multiple lesions involving 2 noncontiguous body regions	D
500	Multiple lesions involving ≥3 body regions	D
600	Generalized skin involvement Multiple lesions confined to three or more contiguous body regions Multiple lesions confined to discontiguous body regions	D
700	Multiple lesions, NOS UNKNOWN if contiguous or discontiguous	RE
800	No evidence of primary tumor	U
999	Unknown; extension not stated Primary tumor cannot be assessed Not documented in medical 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 (5) **Introduction to Hematologic Malignancies**. In: Amin, M.B., Edge, S.B., Greene, F.L., et al. (Eds.) AJCC Cancer Staging Manual. 8th Ed. New York: Springer; 2017 (6) Rosen, S.T., Jaffe, E.S., Leonard, J.P., et al. **Primary Cutaneous Lymphomas**. In: Amin, M.B., Edge, S.B., Greene, F.L., et al. (Eds.) AJCC Cancer Staging Manual. 8th Ed. New York: Springer; 2017