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SEER Inquiry System - Report
Produced: 10/20/2025 4:01 AM
Question 20091001
Inquiry Details
References:
#1: 2007 SEER Manual, C-695, C-697, C-698. Appendix C
#2: CoC I&R 25707, SINQ 20081070, SINQ 20091041
Question:
CS Lymph Nodes/CS Mets at DX--Ovary: Are lymph nodes in the pericolic mesentery of the sigmoid that are removed during ovarian cancer debulking surgery, coded as regional or distant? See Discussion.
Discussion:
Debulking surgery found tumor in both ovaries and in lymph nodes of pericolic mesentery, which was removed en bloc with a segment of sigmoid colon (colon had tumor implants involving serosa). Pericolic nodes are not listed as regional for ovary. However Note 2 in the CS manual for Extension states "sigmoid mesentery" is a regional pelvic organ, and that metastatic deposits here should be coded in the extension field, not as distant mets. Should lymph nodes from this same area be coded as regional or distant?
Answer:
This answer was provided in the context of CSv1 coding guidelines. The response may not be used after your registry database has been converted to CSv2.
Lymph nodes in the mesentery of the sigmoid colon are regional for an ovarian primary. Code involved sigmoid mesenteric nodes under CS Lymph Nodes.
Cancer Site Category:
Ovary
Data Item Category:
N/A
Other Category:
N/A
Year:
2009
