SEER Inquiry System - Search

Solid Tumor Rules/Behavior--Brain and CNS: Why was the Behavior of solitary fibrous tumor (SFT)/hemangiopericytoma, WHO Grade 1 changed from /0 to /1 in the 2025 Solid Tumor Rules (STR) updates? See Discussion.

Solid Tumor Rules--Urinary: The example used in Rule M15 of the Urinary Solid Tumor Rules refers to the same row in Table 3. Should the example say Table 2 since Table 3 is non-reportable urinary tumors. See Discussion.

Solid Tumor Rules 2018/Histology--Testis: What is the histology code for a 2018 diagnosis of left testis tumor diagnosed as mixed germ cell tumor with secondary malignant components: primitive neuroectodermal tumor (PNET) and rhabdomyosarcoma? See Discussion.

Solid Tumor Rules 2018/Histology--Brain and CNS: What code should be used for high grade neuroepithelial tumor with BCOR Alteration? See Discussion

Solid Tumor Rules 2018/Histology--Brain and CNS: How is histology coded for a single meningioma tumor when the histology is a meningioma comprised of multiple specific subtypes/variants? See Discussion.

Solid Tumor Rules (2022)/Histology--Bladder:  Can the term configuration be used to code the more specific histology for bladder primaries diagnosed 2022 and later? See Discussion.

Solid Tumor Rules (2021)/Laterality--Melanoma: Will the table called Site for Which Laterality Code Must Be Recorded be updated in the 2021 SEER Program Coding and Staging Manual as C444 is not included? The 2021 Cutaneous Melanoma Solid Tumor Rules say that C444 requires laterality; it says (new) beside it on the new Solid Tumor Rules for 2021.

Solid Tumor Rules (2018/2021)/Multiple Primaries--Skin Cancer:  How many primaries are assigned for sebaceous carcinomas using the Solid Tumor/Multiple Primaries/Histology Rules?  Does this scenario represent eight separate primaries?  See Discussion.

Solid Tumor Rules (2018/2021)/Multiple primaries--Prostate: Is basal cell carcinoma with focal squamous differentiation and a small focus of infiltrating prostatic adenocarcinoma one or two primaries and if one, is the histology 8147/3? See Discussion.

Solid Tumor Rules (2018/2021)/Multiple primaries--Ovary, Fallopian Tubes: How many primaries should be reported and for which primary site(s) when pathologist identifies bilateral ovarian high-grade serous carcinoma with involvement of the left fallopian tube (also showing serous tubal intraepithelial carcinoma (STIC))? See Discussion.