EOD Primary Tumor
Notes
**Note 1:** The orbital tissues are the support systems of the globe, confined to the space within the surrounding bony structure. The tissues include fat, striated and smooth muscle, fibroconnective, vascular, lymphoid, peripheral nerve, and optic nerve tissue.
**Note 2:** In situ (code 000) may be used only for non-sarcoma histologies coded to this site. Sarcomas do not present as in situ or noninvasive tumors.
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(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
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