Collaborative Stage Data Set - Revised 08/10/2009 FINAL
| Code | Description | Staging Basis |
| 0 | Does not meet criteria for AJCC pathologic staging of distant metastasis: Evaluation of distant metastasis based on physical examination, imaging examination, and/or other non-invasive clinical evidence. No pathologic examination of metastatic tissue performed or pathologic examination was negative. | c |
| 1 | Does not meet criteria for AJCC pathologic staging of distant metastasis: Evaluation of distant metastasis based on endoscopic examination or other invasive technique, including surgical observation without biopsy. No pathologic examination of metastatic tissue performed or pathologic examination was negative. | c |
| 2 | Meets criteria for AJCC pathologic staging of distant metastasis: No pathologic examination of metastatic specimen done prior to death, but positive metastatic evidence derived from autopsy (tumor was suspected or diagnosed prior to autopsy). | p |
| 3 | Meets criteria for AJCC pathologic staging of distant metastasis: Specimen from metastatic site microscopically positive WITHOUT pre-surgical systemic treatment or radiation OR specimen from metastatic site microscopically positive, unknown if pre-surgical systemic treatment or radiation performed OR specimen from metastatic site microscopically positive prior to neoadjuvant treatment. | p |
| 5 | Does not meet criteria for AJCC y-pathologic (yp) staging of distant metastasis: Specimen from metastatic site microscopically positive WITH pre-surgical systemic treatment or radiation, BUT metastasis based on clinical evidence. | c |
| 6 | Meets criteria for AJCC y-pathologic (yp) staging of distant metastasis: Specimen from metastatic site microscopically positive WITH pre-surgical systemic treatment or radiation, BUT metastasis based on pathologic evidence. | yp |
| 8 | Meets criteria for AJCC autopsy (a) staging of distant metastasis: Evidence from autopsy based on examination of positive metastatic tissue AND tumor was unsuspected or undiagnosed prior to autopsy. | a |
| 9 | Not assessed; cannot be assessed Unknown if assessed Not documented in patient record | c |