Detailed site-specific codes for the post therapy clinical (yc) stage group as defined by AJCC.

Clinical, pathological, and post therapy yc and yp stage data are given four separate areas in the NAACCR Data Exchange Record Layout.

CoC requires that AJCC TNM staging be used in its approved cancer programs. AJCC developed its staging system for evaluating trends in the treatment and control of cancer. This staging is used by physicians to estimate prognosis, to plan treatment, to evaluate new types of therapy, to analyze outcome, to design follow-up strategies, and to assess early detection results.

Identifies the remaining anatomic extent of disease based on the T and N following the completion of neoadjuvant therapy (satisfying the definition for that disease site) before planned surgical resection or primary treatment consisting of systemic and/or radiation therapy, and the M status defined during the diagnostic workup.

88	Not applicable, no code assigned for this case in the current AJCC Staging Manual.
99	Unknown, not staged

Note: See the AJCC Cancer Staging Manual, current edition for site-specific categories for the TNM categories and stage groups. See the CURRENT STORE manual for specifications for codes and data entry rules.