An official website of the United States government
Home
SEER Inquiry System - Report
Produced: 10/23/2025 4:02 AM
Question 20081099
Inquiry Details
References:
2007 SEER Manual, 5
Question:
MPH Rules/Behavior--Breast: Would a positive right axillary node following DCIS of the right breast indicate the presence of a new primary? See Discussion.
Discussion:
How would you abstract the information from 2007? A patient with a strong family history of breast cancer had bilateral simple mastectomies in 2000, after a suspicious mammogram. Results showed DCIS in the rt breast; no malignancy in the left breast. Now in 2007, the patient has a right axillary lymph node removed - positive for carcinoma of breast origin. Comment says, "recurrent breast carcinoma in rt axillary node from patient's known history of DCIS." Is this a new primary? Is this a diagnosis date in 2007? Is the site C509 and laterality right side?
Answer:
For cases diagnosed 2007 or later:
A metastasis was diagnosed in 2007. The 2007 MP/H rules do not apply to metastases.
Change the behavior code of the 2000 diagnosis. The breast cancer diagnosed in 2000 must have been invasive based on the metastasis in 2007.
Cancer Site Category:
Breast
Data Item Category:
Behavior
Other Category:
N/A
Year:
2008
