SEER Inquiry System - Search

2018 Solid Tumor Rules/Multiple primaries--Lung: What is the histology and number of primaries for a lung case diagnosed in 2018 with adenocarcinoma with acinar predominant pattern on biopsy, and subsequent lobectomy showing adenocarcinoma with solid growth pattern and separate adenocarcinoma with lepidic predominant pattern? Should this be coded as one primary with an adenocarcinoma, NOS (8140/3) histology since we cannot use pattern or predominant, based on the histologic type listed in the synoptic report, and the fact it states synchronous primary tumors in the same lobe. See Discussion.

2018 Solid Tumor Rules/Multiple Primaries--Breast: How many primaries should be reported when a left breast simple mastectomy identifies focal Paget disease of the nipple and 12 axillary nodes positive for metastatic lobular carcinoma (no primary lobular breast tumor identified)?

2018 Solid Tumor Rules/Histology--Lung: What is the appropriate histology code for the case below in the Discussion section? Is there a difference between adenocarcinoma in situ (bronchioloalveolar carcinoma), non-mucinous type (8252/2) and adenocarcinoma in-situ, mucinous? See Discussion.

2018 Solid Tumor Rules/Histology--Colon: What is the histology code of a diagnosis of well differentiated neuroendocrine tumor (NET), grade 2 of the appendix? See Discussion.

2018 SEER Manual/Primary Site--Ovary, Fallopian Tube: How should primary site be coded for a previously diagnosed ovarian cancer which is now being reclassified as fallopian tube? See Discussion.

2016 SEER Manual/Primary Site--Corpus Uteri: Is the primary site C541 (endometrium) or C543 (uterine fundus) when the histology states endometrial adenocarcinoma, endometrioid type, but tumor site states fundus? See Discussion.

EOD 2018/EOD Primary Tumor/Tumor Size--Clinical--Prostate: How is Tumor Size--Clinical coded when there is an incidental finding of prostate cancer on prostatectomy for another reason? See Discussion.

Ambiguous terminology/Reportability--Thyroid: Should a thyroid case be accessioned based only on a cytology that is consistent with papillary carcinoma? See Discussion.

SEER Manual/Reportability--Ambiguous Terminology:  Please clarify the reportability and relevant date ranges of the following ambiguous terminology: almost certainly, most certainly, and malignant until proven otherwise.  See Discussion.