Report the primary site of cancer, if known, for patients who have been diagnosed with a cancer.
In ICDO, primary site is identified using both the Cxx.x code identifying site and the behaviour code to identify whether the site is the primary site. The behaviour code numbers used in ICDO are listed below:
0 Benign
1 Uncertain whether benign or malignant
borderline malignancy
low malignant potential
2 Carcinoma in situ
intraepithelial
non-infiltrating
non-invasive
3 Malignant, primary site
6 Malignant, metastatic site
malignant, secondary site
9 Malignant, uncertain whether primary or metastatic site
Data element attributes
Collection and usage attributes
Collection methods:
Cancer registries use Site codes from ICDO 3rd edition.
