The SEER Inquiry System (SINQ) is a searchable collection of questions that cancer registrars have had while coding cancer cases. These are questions submitted by designated registrars in SEER registries. The questions are answered by expert staff and go through a rigorous review process by NCI SEER staff and designated SEER registry staff before being added to SINQ.

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Recent Questions
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Solid Tumor Rules (2018)/Histology--Brain and CNS: Table 6 (Non-Malignant CNS Equivalent Terms and Definitions) lists Adenomatous craniopharyngioma 9351/1 as a subtype/variant of craniopharyngioma 9350/1. This is not a valid histology per the ICD-O-3 or the 2018 ICD-O-3 Update Table. Is this actually supposed to read, Adamantinomatous craniopharyngioma 9351/1?

Final Jun 28 2019

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.

Final Jun 24 2019

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.

Final Jun 24 2019

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.


Final Jun 18 2019

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

Final Jun 13 2019

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.

Final Jun 07 2019

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

Final Jun 07 2019

Reportability/Liver:  If on imaging, there is no statement of the Liver Imaging Reporting and Data System (LI-RADS) score but there is reference that a lesion is in the Organ Procurement and Transplantation Network (OPTN) 5 category, is hepatocellular carcinoma (HCC) reportable based on the OPTN  5 classification?  See Discussion.

Final Jun 07 2019

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?

Final Jun 07 2019

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.

Final Jun 03 2019
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