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SEER Inquiry System - Report
Produced: 05/17/2026 7:11 PM
Question 20190068
Inquiry Details
References:
2018 SEER Manual, 165-168
Question:
First course treatment/Scope of Reg LN Surgery--Breast: How is Scope of Regional Lymph Node Surgery coded when the operative report does not agree with the actual number and type of nodes removed? Are we attempting to capture the intended surgery or the type and number of nodes removed? See Discussion.
Discussion:
Example 1: Operative report states the surgery is a right breast simple mastectomy. There is no lymph node removal documented or attempted; however, a single incidental intramammary node is found in the final pathology results. How should these nodes be captured in the Scope of Regional Lymph Node Surgery field?
CAnswer Forum states to code Scope of Regional Lymph Node Surgery as 0 (No regional lymph nodes removed), see Scope LN surgery, incidental LN found on path, Breast.
However, SEER Program Coding and Staging Manual 2018 instruction states: Code the removal of intra-organ lymph nodes in Scope of Regional Lymph Node Surgery. Example: Local excision of breast cancer. Specimen includes an intra-mammary lymph node. Assign code 4 (1 to 3 regional lymph nodes removed).
The STORE 2018 Manual does not provide instruction for incidental nodes specifically, but does appear to be focused on capturing procedural intent.
Example 2: Patient has bilateral breast primaries. Operative report states the surgery is bilateral simple/skin-sparing mastectomies with bilateral sentinel node biopsies and immediate reconstruction. However, pathology shows that the left breast specimens are labeled: (a) Left breast mastectomy, (b) Left sentinel lymph node biopsy, (c) Additional left lymph nodes biopsy, and (d) Left axillary contents biopsy. The total nodes removed for this case are: 2/2 positive SLN, 0/1 positive intramammary nodes, 1/1 positive additional lymph node, and 3/3 positive axillary contents nodes. How should these nodes be captured in the Scope of Regional Lymph Node Surgery field?
Answer:
Assign the best code in Scope of Regional Lymph Node Surgery to capture the type and number of nodes removed.
Example 1: Code 4; 1 to 3 regional lymph nodes removed. There is no statement of the procedure being a SLNBx or dissection in the operative report; the pathology report identified one incidental regional lymph node. Coding instruction #4 example says to assign code 4 if there is a local excision of breast cancer and specimen includes an intra-mammary lymph node.
Example 2: Code 6, Sentinel node biopsy and code 3, 4, or 5 at same time or timing not noted. The operative report describes sentinel node biopsies only and does not mention axillary lymph node dissection; however, the pathology report details other lymph nodes in addition to the SLNBx. In addition to the LSLNbx and left LN bx, the pathology report describes "Left axillary contents biopsy" and a total of seven lymph nodes removed.
