Collaborative Staging was originally developed to translate between which staging systems?

• A. SEER Summary Staging System
• B. FIGO staging system
• C. Clark's level
• D. Ann Arbor staging system

Answer: (C)

Collaborative Staging is a standardized framework for recording cancer stage in a way that can be translated across different staging schemes. It was originally developed to bridge AJCC’s TNM staging with SEER’s Summary Stage, so data collected under either system could be harmonized and compared consistently across registries and sites. This makes it possible to convert detailed TNM information into a common summary stage and vice versa, enhancing data interoperability.

Clark's level is a histologic depth measure used in melanoma, not a staging scheme, and Ann Arbor and FIGO are separate, site-specific staging systems (lymphomas and gynecologic cancers, respectively). So the purpose of Collaborative Staging is to translate between AJCC TNM and SEER Summary Stage, not to map to those other measures.