EOD Primary Tumor

Notes

**Note 1:** **Lacrimal Sac** * The lacrimal sac is the upper dilated end of the nasolacrimal duct, lodged in a deep groove formed by the lacrimal bone and frontal process of the maxilla. * The sac connects the lacrimal canaliculi, which drain tears from the eye's surface, and the nasolacrimal duct, which conveys this fluid into the nasal cavity. * The most common epithelial tumors of the lacrimal sac are squamous cell and transitional cell carcinomas. **Note 2:** **Periosteum** * Periosteum is a fibrous membrane that wraps the outer surface of bones.
Code Description SS2018 T
000 In situ: Noninvasive; intraepithelial IS
100 Confined to lacrimal sac Localized, NOS L
200 Adjacent bone Globe (eyeball) Optic nerve Orbital soft tissues Periosteum RE
700 Adjacent structures, NOS Brain Pterygoid fossa Sinus Temporal fossa 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)