Sequence number

What is Sequence number?

Sequence number meaning A unique identifier for each separate primary for a patient that describes the chronology of diagnoses, allowing the registry to identify patients who have multiple primaries. The sequence number indicates the number of primary cancers the patient has had in his or her lifetime, not just the number of primary cancers included in the reporting registry. Malignant cancers start at 00 and benign or borderline tumors start at 60.


reference: national Cancer Institute – Glossary for Registrars

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