California Cancer Reporting System Standards Volume I: Abstracting and Coding Procedures for Hospitals
Accurate identification of a patient's primary neoplasm is essential for determination of the extent to which the disease has progressed. It is also imperative for successful use of the data by research scientists and public health officials.
A primary neoplasm is the original lesion, as compared to a tumor that has developed as a result of metastasis or extension. A patient might have many lesions that developed from one tumor or different tumors that developed independently.
Refer to the most current Multiple Primary and Histology Coding Rules for coding instructions. This applies to cases diagnosed January 1, 2007 and forward. The following MPH rules:
Replace all previous multiple primary rules except those for hematopoietic neoplasms.
Determine the number of primaries to be abstracted.
Do not use the Multiple Primary and Histology Rules to determine reportability, stage or to assign grade.
For hematopoietic and lymphoid cases diagnosed January 1, 2012 and forward, use the 2012 Hematopoietic database and manual to abstract hematopoietic cases.
Kaposi's Sarcoma (9140/3) is to be reported only once.