EOD Primary Tumor

Notes

**Note 1:** The cortex of a bone is the dense outer shell that provides strength to the bone; the spongy center of a bone is the cancellous portion. The periosteum of the bone is the fibrous membrane covering of a bone that contains the blood vessels and nerves; the periosteum is similar to the capsule on a visceral organ. **Note 2:** The number of pelvic segments involved by the primary tumor determines the appropriate EOD Primary Tumor (codes 100 through 550). The four pelvic segments used in these codes are: * Acetabulum * Iliac wing * Pubic ramus/Symphysis/Ischium * Sacrum
Code Description SS2018 T
100 Any size tumor - One pelvic segment involved AND no extraosseous extension L
200 Code 100 WITH extraosseous extension - Beyond periosteum to surrounding tissues, including adjacent skeletal muscle(s) RE
300 Any size tumor - Two pelvic segments involved AND no extraosseous extension L
400 Code 300 WITH extraosseous extension - Beyond periosteum to surrounding tissues, including adjacent skeletal muscle(s) RE
500 At least three pelvic segments involved, NOS L
550 Code 500 WITH extraosseous extension - Beyond periosteum to surrounding tissues, including adjacent skeletal muscle(s) RE
600 Confined to pelvis, NOS (number of segments involved not known) Localized, NOS L
650 Sacroiliac joint Sacral neuroforamen D
700 Encasement of external iliac vessels D
750 Gross tumor thrombus in major pelvic vessels 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) (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) Kneisl, J.S., Rosenberg, A.E., et al. **Bone**. In: Amin, M.B., Edge, S.B., Greene, F.L., et al. (Eds.) AJCC Cancer Staging Manual. 8th Ed. New York: Springer; 2017