NAACCR Item #2910: CS Site-Specific Factor 4
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NAACCR XML: Tumor.csSiteSpecificFactor4
Identifies additional information needed to generate stage, or prognostic factors that have an effect on stage or survival.
Site-specific factors are used to record additional staging information needed by Collaborative Staging to derive TNM and/or SEER Summary Stage codes for particular site-histology schema.