SEER Inquiry System - Report
Produced: 10/16/2025 4:07 AM
Question 20021070
Inquiry Details
References:
#1: CS Manual, Part II, 460. Vers 01.02.00, April 25, 2005
#2: AJCC Cancer Staging Manual, 225. 6th Edition
Question:
Discussion:
Answer:
History:
For cases diagnosed 1998-2003:
Code the invasive tumor in the axillary area as a regional lymph node metastasis if the tumor nodule is equal to or greater than 3 mm. If it is less than 3 mm, code the involvement in the EOD-Extension field as discontinuous extension of tumor [85]. If the size of this tumor is not specifically mentioned, use this guideline: A 3 mm tumor is visible to the naked eye, a tumor less than 3 mm is not.
Reference: SEER EOD-88, 3rd Ed, pg 111