Data Last Updated: June 9, 2025

NAACCR Item #3908: Percent Necrosis Post Neoadjuvant

Item # Length Source of Standard Section Name Year Implemented Version Implemented XML NAACCR ID Parent XML Element
3908 5 NAACCR Stage/Prognostic Factors 2018 18 percentNecrosisPostNeoadjuvant Tumor
Required Status:

NPCR Collect: No recommendation
CoC Collect: Required, site specific
SEER Collect: Collected by SEER from CoC-accredited hospitals
CCCR Collect: Required, site specific; when available

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.
Allowable Values
0.0, 0.1-100.0, XXX.2, XXX.8, XXX.9
Codes
Code Description
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
Code Notes
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.