Queen's Research Data Centre

Queen's Research Data Centre

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Canadian Cancer Registry (CCR) 2015 - Surveillance Epidemiology and End Results (SEER)

The Canadian Cancer Registry (CCR) 2015 – Surveillance, Epidemiology and End Results Program (SEER) is now available for download and can be accessed by researchers with approved projects that were specifically granted permission to access this CCR-SEER file. The existing CCR has been renamed CCR-IARC. Access is granted separately for CCR-IARC and CCR-SEER.

Multiple primaries

There are two common systems of rules used to determine when a second or subsequent cancer should be considered a new primary cancer, as opposed to a relapse or a metastasis of a previously diagnosed cancer: one from the International Agency for Research on Cancer (referred to as the “IARC rules”) and one from the Surveillance, Epidemiology, and End Results Program (referred to as “SEER rules”). In general, SEER rules consider factors such as sub-site, histology, timing, behaviour and laterality depending on the cancer site.

IARC rules yield similar or lower total case counts than the SEER rules because IARC rules generally do not permit multiple cancers to be diagnosed at the same site within a single individual. Other distinctions with IARC rules include the following:

Diagnosis of two or more primary tumours does not depend on time.

Certain histology groupings are considered to be different for the purpose of defining multiple primary tumours in comparison to SEER rules.

For any CCR related questions please contact the Survey Focal Point Carmina Ng (torontordc.cng@utoronto.ca). All other inquiries can be sent to our generic email address STATCAN.de-mad-rdcdata.STATCAN@canada.ca.

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