Pathologic variablesLymphovascular invasion, perineural invasion, margin status Pathologic variables collected vary by cancer site. Treatment factors Method of diagnostic confirmation, receipt of surgery, extent of surgery, b receipt of radiation, order of treatment Clinician information, surgical approach, radiation dose, chemotherapy, hormonal therapy, immunotherapy Outcomes Date of death, cause of death Cancer recurrence Abbreviation: SEER, The Surveillance, Epidemiology, and End Results. a These data points are SEER summary stages; American Joint Committee on Cancer Tumor, Nodes, and Metastases classification system was put in place starting in 2004.b These data points are specific to certain cancer sites.

No abstract

No abstract