Disclaimer. This site is a training resource for oncology data specialists and cancer registration trainees. It is not intended to provide medical advice or to guide clinical care, diagnosis, or treatment. NCI urges users to consult with a qualified physician for diagnosis and for answers to their personal medical questions.

Providing web-based training modules for cancer registration and surveillance

TNM Data Collection Today

Important

These modules are archived and should only be referenced for historical purposes.

Clinical

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Pathological

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Stage Group ___

Tumor markers (as indicated)

Problems:

Output must be 'pure' clinical, 'pure' pathologic or unstageable
Registry stores interpreted data, not facts

Suggested Citation

SEER Training Modules: TNM Data Collection Today. U.S. National Institutes of Health, National Cancer Institute. Cited 19 December 2025. Available from: https://training.seer.cancer.gov.