This code system http://hl7.org/fhir/us/breastcancer/CodeSystem/oncology-StageTimingPrefixCS defines the following codes:
| Code | Display | Definition |
| cli | Clinical stage: Staging performed prior to surgery, based on evidence such as physical examination, imaging, and/or biopsy. | Clinical stage: Staging performed prior to surgery, based on evidence such as physical examination, imaging, and/or biopsy. |
| path | Pathologic stage: Staging performed based on examination of tissue samples removed during surgery, in addition to physical examination and imaging. | Pathologic stage: Staging performed based on examination of tissue samples removed during surgery, in addition to physical examination and imaging. |
| postther_cli | Post-therapeutic (post-neoadjuvant) clinical staging based on clinical examination after the first treatment with systemic drugs or radiation, when no surgery has been performed. | Post-therapeutic (post-neoadjuvant) clinical staging based on clinical examination after the first treatment with systemic drugs or radiation, when no surgery has been performed. |
| postther_path | Post-therapeutic (post-neoadjuvant) pathologic staging, based on tissue samples removed during surgery after the first treatment with systemic drugs or radiation. | Post-therapeutic (post-neoadjuvant) pathologic staging, based on tissue samples removed during surgery after the first treatment with systemic drugs or radiation. |
