California Cancer Reporting System Standards Volume I: Abstracting and Coding Procedures for Hospitals
A tumor marker is a substance found in the blood, urine, or body tissues that can be elevated in cancer, among other tissue types. There are many different tumor markers, each indicative of a particular disease process, and they are used in oncology to help detect the presence of cancer.
Refer to the most current Collaborative Stage Coding Instructions Manual (Part 1, Section 2), for coding instructions. This applies to cases diagnosed January 1, 2010 and forward.