EOD Primary Tumor

Notes

**Note 1:** In the case of multiple simultaneous tumors, code the tumor with the greatest extension. **Note 2:** Skin ulceration does not alter the classification.

Code	Description	SS2018 T
000	Carcinoma in situ, noninvasive Intraepithelial Bowen disease; intraepidermal	IS
100	Lesion(s) confined to dermis Subcutaneous tissue (through entire dermis)	L
200	Bone Cartilage Skeletal muscle Underlying cartilage	RE
700	Further contiguous extension	D
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)