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.
|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|