In what year was Version 1 of the Collaborative Staging System released?

• A. 2001
• B. 2004
• C. 2005
• D. 2009

Answer: (B)

Version 1 of the Collaborative Staging System was released in 2004. This system was created to standardize how cancer registry data are collected and coded so that a single, consistent stage can be derived across different cancers and registries. By defining a common set of data elements and coding rules, Version 1 enabled registries to map tumor details (like extent of disease, nodal involvement, and metastasis) into a unified stage category that aligns with AJCC criteria. The 2004 release established the baseline for standardized staging data, with later updates expanding coverage and refining details.