Item #	Length	Source of Standard	Year Implemented	Version Implemented	Year Retired	Version Retired
3908	5	NAACCR	2018	18

Description

Percent Necrosis Post Neoadjuvant is a prognostic factor for bone sarcomas.

Rationale

Percent Necrosis Post Neoadjuvant is a Registry Data Collection Variable for AJCC. It was previously collected as Bone, CS SSF# 3.

Codes

0.0	Tumor necrosis not identified/not present
0.1-100.0	0.1–100.0 percent tumor necrosis (Percentage of tumor necrosis to nearest tenth of a percent)
XXX.2	Tumor necrosis present, percent not stated
XXX.8	Not applicable: Information not collected for this case (If this item is required by your standard setter, use of code XXX.8 will result in an edit error.)
XXX.9	Not documented in medical record No histologic examined of primary site No neoadjuvant therapy No surgical resection of primary site is performed

Each Site-Specific Data Item (SSDI) applies only to selected primary sites, histologies, and years of diagnosis. Depending on applicability and standard-setter requirements, SSDIs may be left blank.