SEER Inquiry System - Search

Solid Tumor Rules (2018)/Histology--Brain and CNS: What is the histology code for a central nervous system (CNS) Ewing sarcoma family tumor with CIC alteration of the right parietal lobe? See Discussion.

Solid Tumor Rules (2018)/Multiple Primaries--Head & Neck: How many primaries are accessioned when a patient is diagnosed with right nasal cavity (C300) invasive nonkeratinizing squamous cell carcinoma (8072/3) in 2015 treated with radiation and excision, followed by a 2019 right nasal cavity (C300) invasive squamous cell carcinoma (NOS, 8070/3)? See Discussion.

Update to current manual/Solid Tumor Rules (2018)/Histology--Lung: What is the histology code and what M Rule applies when there are multiple specific subtypes identified using various equivalent lung terms but only one is stated to be predominant? See Discussion.

Reportability/Melanoma: Is evolving melanoma reportable with a Clark's level and Breslow's thickness are cited in the pathology report? See Discussion.

Lymph nodes/Melanoma: Is a single axillary lymph node regional or distant for a patient diagnosed in 2018 with metastatic melanoma to the brain found via imaging. The staging procedure was an single axillary lymph node excision that was positive for metastatic melanoma. The exact site of the primary was never determined; the primary site is coded to C449. See Discussion.

Reportability/Histology--Skin: Is malignant hidroacanthoma simplex of the scalp reportable? If so, what is the histology?

Tumor Size/Bladder: The 2018 SEER Coding and Staging Manual says to use imaging over physical exam as priority for determining tumor size. If a bladder tumor is 4 cm visualized on cystoscopy, and is 2.8 cm on CT scan, which should be used as the clinical size? Is cystoscopy (endoscopy) a clinical exam or imaging?

Solid Tumor Rules (2018)/Multiple Primaries--Head & Neck: How many primaries are accessioned and what M Rule applies when a patient is diagnosed with a right lateral tongue (C023) tumor in 2016 that was verrucous carcinoma (8051), followed by a new left tongue border (C021) tumor in 2019 that was squamous cell carcinoma, NOS (8070)? See Discussion.

Solid Tumor Rules (2018)/Histology--Colon: Is the term phenotype equivalent to type, subtype, variant for the purpose of coding histology? See Discussion.

Diagnostic Confirmation: How is Diagnostic Confirmation coded for malignancies diagnosed by a FoundationOne Liquid biopsy/assay involving circulating tumor DNA in blood only? See Discussion.