SEER Inquiry System - Question 20190015 Details

There is a discrepancy between Notes 3 and 6 in the schemas Fallopian Tube, Ovary, and Primary Peritoneal Carcinoma for EOD Primary Tumor. Note 3 describes extension/discontinuous metastasis to the pelvic sites (code 450) and includes the sigmoid colon, rectosigmoid and rectum since these are all pelvic sites. However, Note 6 also includes rectosigmoid and sigmoid colon.

Note 6 is describing extension/discontinuous metastasis to the abdominal sites (600-750), so it should include rectosigmoid or sigmoid colon (since those are pelvic sites). Note 6 indicates, Intestine, large (except rectum). In the previous Collaborative Stage, the corresponding note used to also include: except sigmoid colon, rectosigmoid and rectum.

Did sigmoid colon and rectosigmoid get removed from the list here? That is, should Note 6 read, Intestine, large (except sigmoid colon, rectosigmoid, rectum)? Involvement of the sigmoid, rectosigmoid, or rectum via peritoneal seeding/metastasis is consistent with T2b disease and would correlate with code 450 (pelvic sites), not codes 600-750 (abdominal sites). Those codes only correlate with T3 and greater disease (i.e., peritoneal seeding/metastasis of the abdomen).