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SEER Inquiry System - Report
Produced: 10/24/2025 4:37 PM
Question 20031206
Inquiry Details
References:
SEER EOD-88, 3rd Ed, 7
Question:
EOD-Extension: How is this field coded for synchronous primaries when metastatic disease is found and there is no statement to indicate which primary is the source of the metastases? See Description.
Discussion:
Patient was diagnosed with both esophageal and pancreatic cancer. Liver metastases were also identified. The source of the liver mets is unknown.
Answer:
For cases diagnosed 1998-2003: Search the record for information about the source of the metastasis. If no such information can be found, code the metastasis to both primaries. Update the abstracts when information becomes available confirming the primary site responsible for the metastasis. Assuming the liver metastases in the example above are distant (i.e. not contiguous) code extension as 85 [Metastasis].
Cancer Site Category:
N/A
Data Item Category:
N/A
Other Category:
Multiple primaries
Year:
2003
