Collaborative Stage Data Set - Revised 11/04/2010 FINAL
| Code | Description | Staging Basis |
| 0 | Does not meet criteria for AJCC pathologic staging: No surgical resection done. Evaluation based on physical examination, imaging examination, or other non-invasive clinical evidence. No autopsy evidence used. | c |
| 1 | Meets criteria for AJCC pathologic staging: No surgical resection done. Evaluation based on endoscopic examination, diagnostic biopsy, including fine needle aspiration biopsy, or other invasive techniques including surgical observation without biopsy. No autopsy evidence used. | p |
| 2 | Meets criteria for AJCC pathologic staging: No surgical resection done, but evidence derived from autopsy (tumor was suspected or diagnosed prior to autopsy) | p |
| 3 | Meets criteria for AJCC pathologic staging: Surgical resection performed WITHOUT pre-surgical systemic treatment or radiation OR surgical resection performed, unknown if pre-surgical systemic treatment or radiation performed. Evidence acquired before treatment, supplemented or modified by the additional evidence acquired during and from surgery, particularly from pathologic examination of the resected specimen. | p |
| 5 | Does not meet criteria for AJCC y-pathologic (yp) staging: Surgical resection performed AFTER neoadjuvant therapy and tumor size/extension based on clinical evidence, unless the pathologic evidence at surgery (AFTER neoadjuvant) is more extensive (see code 6). | c |
| 6 | Meets criteria for AJCC y-pathologic (yp) staging: Surgical resection performed AFTER neoadjuvant therapy AND tumor size/extension based on pathologic evidence, because pathologic evidence at surgery is more extensive than clinical evidence before treatment. | yp |
| 8 | Meets criteria for autopsy (a) staging: Evidence from autopsy only (tumor was unsuspected or undiagnosed prior to autopsy) | a |
| 9 | Unknown if surgical resection done Not assessed; cannot be assessed Unknown if assessed Not documented in patient record | c |