SEER Inquiry System - Question 20041013 Details

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Produced: 10/04/2025 10:00 AM

Question 20041013

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Inquiry Details

References:

Question:

Primary Site--Ovary/Peritoneum: Should this field be coded to ovary or peritoneum when the bulk of the tumor is in the peritoneum and there is only surface involvement of the ovary?

Discussion:

Answer:

If it is not clear where the tumor originated, use the following criteria to distinguish ovarian primaries from peritoneal primaries.

The primary site is probably ovarian, unless:

--Ovaries have been previously removed

--Ovaries are not involved (negative)

--Ovaries have no area of involvement greater than 5mm.

Descriptions such as "bulky mass," "omental caking" probably indicate an ovarian primary.

Descriptions such as "seeding," "studding," "salting" probably indicate a peritoneal primary.

Cancer Site Category:

Ovary

Data Item Category:

Primary site

Other Category:

N/A

Year:

2004