SEER Inquiry System - Question 20091129 Details

System Guide

Back to Search Results

SEER Inquiry System - Report

Produced: 03/25/2026 9:04 AM

Question 20091129

Export CSV Export PDF Print

Add to Report

Inquiry Details

References:

#1: 2007 SEER Manual, 70

#2: 2007 SEER Manual, C-619. Appendix C

Question:

Primary Site--Breast: What subsite is to be coded for a case of invasive Paget disease of the nipple with an infiltrating ductal carcinoma of the lower inner quadrant?

Discussion:

Answer:

Code C50.9 [Breast, NOS]. Code the last digit of the primary site to '9' for single primaries when multiple tumors arise in different subsites of the same anatomic site and the point of origin cannot be determined. Nipple [C50.0] and LIQ [C50.3] fit this rule. This is a single primary per MP/H Breast Rule M9.

Cancer Site Category:

Breast

Data Item Category:

Primary site

Other Category:

N/A

Year:

2009