EOD Primary Tumor

Notes

**Note 1:** Involvement of or extension to bone includes any type of tumor extension to the bone, such as erosion, invasion, extension, penetration, or destruction. **Note 2:** Code 400 for base of skull, NOS when there is no information available for more specific bony structures in the skull.
Code Description SS2018 T
000 In situ, intraepithelial, noninvasive IS
100 Confined to - Mucosa of maxillary sinus (antrum) - WITHOUT erosion or destruction of bone Confined to maxillary sinus, NOS Localized, NOS L
200 Bone erosion or destruction Hard palate Middle nasal meatus Nasal cavity - Floor - Lateral wall - Septum - Turbinates Palatine bone RE
300 Bone of posterior wall of maxillary sinus Ethmoid sinuses (anterior, posterior, NOS) Floor or medial wall of orbit Floor or posterior wall of maxillary sinus Maxilla, NOS Pterygoid fossa Subcutaneous tissues RE
400 Anterior orbital contents Base of skull, NOS Cribriform plate Frontal sinus Infratemporal fossa Orbital contents including eye Pterygoid plates Skin of cheek Sphenoid sinus RE
600 Brain Clivus Cranial nerves (other than V2, maxillary division of trigeminal nerve) Dura Middle cranial fossa Nasopharynx Orbital apex Pterygomaxillary fossa Temporal fossa Soft palate 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 patient record Death Certificate Only U
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