SEER Inquiry System - Search

Solid Tumor Rules/Histology--Head & Neck:  How is histology coded for nasopharyngeal non-keratinizing squamous cell carcinoma, undifferentiated type? See Discussion.

Solid Tumor Rules/Multiple Primaries--Bladder:  Urinary Sites Solid Tumor Rules (STRs), Rule M6, says to abstract multiple primaries when an invasive tumor occurs more than 60 days after an in situ tumor. Does that 60-day interval apply to the original diagnosis date, or to the latest recurrence? See Discussion.

Solid Tumor Rules/Histology--Oropharynx:  How is histology coded for a 2024 squamous cell carcinoma of the tonsil when immunohistochemistry (IHC) stains are negative for p16, but in situ hybridization (ISH) testing is positive for human papilloma virus (HPV)? See Discussion.

Heme and Lymphoid Neoplasms/Multiple Primaries--Myeloproliferative Neoplasms:  Are essential thrombocytosis (ET) in 1998 and primary myelofibrosis in 2022 the same primary or is the 2022 diagnosis a new primary? See Discussion.

Reportability/Histology:  Does Cancer Pathology Coding Histology And Registration Terminology (Cancer PathCHART) determine if the histology is reportable or do we have to use the Excel ICD-O-3.2 spreadsheet?

Solid Tumor Rules/Histology--Ovary:  How is histology coded for an ovary case with a diagnosis of “high grade papillary serous carcinoma” in 2023? This term is not in the Solid Tumor Rules and ICD-O 3.2 updates. Is “high grade papillary serous carcinoma” equivalent to “high grade serous carcinoma” (8461) or to “papillary serous adenocarcinoma” (8441) with high grade captured only in the Grade fields, or is there another more appropriate code?

Reportability/Ambiguous Terminology--Kidney:  Is a clinical diagnosis of a right kidney lesion with a “75% chance of malignancy” reportable when no further information is available? See Discussion.

Histology--Heme & Lymphoid Neoplasms:  How should histology be coded for a pathologic diagnosis of “Follicular lymphoma, diffuse pattern grade 3A of 3, equivalent to diffuse large B cell lymphoma (germinal center cell type)” when later referenced clinically as follicular lymphoma grade 3A? See Discussion.

Solid Tumor Rules/Histology--Ovary:  What is the histology code for an ovarian primary with a pathology report final diagnosis of “Small-Cell Carcinoma (Hypercalcemic Type), Large-Cell Variant” diagnosed in 2012 (using the Multiple Primaries H rules) and one diagnosed in 2024 (using the Solid Tumor Rules)? See Discussion.

Primary Site/Histology--Ovary: We are encountering a primary site, histologic type, and behavior combination edit based on the Cancer PathCHART (CPC) tables. Using the CPC*Search tool, C569 and 8441/3 is a valid combination. The diagnosis date is 01/13/2024. Should an over-ride be applied with this combination?