EOD Primary Tumor

Notes

**Note:** 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.
Code Description SS2018 T
100 Any size tumor Confined to cortex of bone Extension beyond cortex to periosteum (no break in periosteum) Localized, NOS L
200 Any size tumor with extension to Adjacent bone/cartilage Beyond periosteum to surrounding tissues, including adjacent skeletal muscle(s) RE
300 Any size tumor with extension to - Skin D
500 Discontinuous tumors in the primary bone site 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
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