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National Cancer Data Base - Data Dictionary PUF 2014

CS Mets at DX-Brain

PUF Data Item Name: 
NAACCR Item #: 
Allowable values: 
0, 1, 8, 9
Identifies the presence of distant metastatic involvement of the brain at the time of diagnosis.
Registry Coding Instructions: 

Code information about brain metastases only (discontinuous or distant metastases to brain) known at the time of diagnosis.  This field should not be coded for involvement of the spinal cord or other parts of the central nervous system.
Brain involvement may be single or multiple.
Information about brain involvement may be clinical or pathologic.
Code this fields whether or not the patient had any preoperative systemic therapy.
This field should be coded for all solid tumors, Kaposi sarcoma, Unknown Primary Site, and Other and Ill-Defined Primary Sites.
Use code 8 for Hematopoietic, Reticuloendothelial, Immunoproliferative aned Myeloproliferative Neoplasms, and Hodgkin and non-Hodgkin Lymphoma.
Use code 9 when it cannot be determined from the medical record whether the patient specifically had brain metastases; for example, when CS Mets at DX is coded as carcinomatosis but the brain is not specifically mentioned as a metastatic site.  Also use code 9 when it is not known whether the patient had any distant metastases.

NCDB System Code Assignments: 

0 = None; no brain metastases
1 = Yes
8 = Not applicable
9 = Unknown whether the brain is involved; Not documented in patient record

Analytic Note: 

This item was first collected in 2010.  Because of delays in some hospitals in implementing registry software updates, data may be incomplete for 2010 diagnoses.

Links to the site-specific codes can be found at