ICCC Extended Site

Field Length:  3

This is a calculated field which does not appear on the abstract form, but is available in data analysis.  The International Classification of Childhood Cancer, 3rd Edition (ICCC3) classifies childhood cancer based on tumor morphology and primary site, with an emphasis on morphology, rather than the emphasis on primary site for adults. A guide to the three digit extended site codes may be found on SEER's website:  http://seer.cancer.gov/iccc/iccc3_ext.html