| Report | Question ID | Question | Discussion | Answer | Year |
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20250019 | SEER Manual/Tumor Size Summary--Breast: Can the size of a non-mass enhancement (NME) be used if it represents the largest size within the appropriate time frame to code tumor size summary when neoadjuvant therapy is administered? Clinical and pathologic tumor sizes are no longer collected for 2024 and 2025 cases. See Discussion. |
In the SEER Program Coding and Staging Manual 2023, under clinical tumor size (page 115, item #12), it states: “For breast tumors, clinical size may be recorded based on the size of a non-mass enhancement (NME). NME is defined as an enhancing abnormality that is not associated with the three-dimensional volume of a mass, shape, and outlining, and it is separate from Background Parenchymal Enhancement (BPE).” This guidance does not appear to have been carried forward into the Tumor Size Summary coding instructions. |
Do not use the NME size from magnetic resonance imaging (MRI) to code tumor size when both tumor size and NME size are stated or if NME is the only size available. The size of the solid tumor mass takes priority over the size of the NME when provided separately and the NME is larger. The American College of Radiology, Breast Imaging Reporting and Data System (BI-RADS) defines NME as an area of enhancement on MRI that does not belong to a 3D mass or have distinct features of a mass. It is a separate descriptor from size that includes modifiers describing enhancement patterns with a specific MRI pattern. |
2025 |
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20250006 | Reportability/Histology--Appendix: Is carcinoid of the appendix reportable? If yes, when did this take effect? |
Report carcinoid, NOS of the appendix. As of 01/01/2015, the ICD-O-3 behavior code changed from /1 to /3. |
2025 | |
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20250017 | SEER Manual/First Course Therapy--Neoadjuvant Therapy: How is Neoadjuvant Therapy--Treatment Effect coded for bladder cancers? The College of American Pathologists (CAP) Protocol for the Examination of Cystectomy Specimens From Patients With Carcinoma of the Urinary Bladder does not provide a clear distinction between the SEER site-specific codes for Neoadjuvant Therapy Treatment Effect for All Other Schemas, codes 2, 3, and 4, as compared to the CAP Treatment Effect Post Neoadjuvant Chemotherapy (BCG not included) categories. See Discussion. |
CAP Protocol for the Examination of Cystectomy Specimens From Patients With Carcinoma of the Urinary Bladder/Treatment Effect Post Neoadjuvant Chemotherapy (BCG not included) selections o No known presurgical neoadjuvant therapy o Complete response: Absence of histologically identifiable residual cancer cells and extensive fibrosis of the tumor bed after presurgical neoadjuvant therapy (TRG1) o Strong response: Predominant fibrosis of the tumor bed, with residual cancer cells occupying less than 50% of this area (TRG2) o Weak or no response: Residual cancer cells occupying ≥50% of the tumor bed or absence of regressive changes (TRG3) o Other (specify): _________________ SEER Coding Instruction for Site-Specific Codes for Neoadjuvant Therapy Treatment Effect - Schemas: All Other Schemas selections 0 Neoadjuvant therapy not given/no known presurgical therapy 1 Complete pathological response Present: No viable cancer cells/no residual invasive carcinoma identified Residual in situ carcinoma only 2 Near complete pathological response Present: Single cells or rare small groups of invasive cancer cells 3 Partial or minimal pathological response Present: Residual invasive cancer with evident tumor regression, but more than single cells or rare small groups of cancer cells 4 Poor or no pathological response Absent: Extensive residual cancer with no evident tumor regression 6 Neoadjuvant therapy completed and surgical resection performed, response not documented or unknown Cannot be determined 7 Neoadjuvant therapy completed and planned surgical resection not performed 9 Unknown if neoadjuvant therapy performed Unknown if planned surgical procedure performed after completion of neoadjuvant therapy
Death Certificate only (DCO) |
Code Neoadjuvant Therapy--Treatment Effect using the surgical pathology report only. Carefully review the pathology report gross description and comments to assist with assignment of codes. Review of neoadjuvant therapy data items is currently underway. |
2025 |
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20250009 | Sequence Number--Central/Reportability--Heme & Lymphoid Neoplasms: Is a hematolymphoid disease included in the sequencing if it was not reportable at the time of diagnosis? |
Do not include the disease in the sequencing if the original hematolymphoid disease was not reportable at time of diagnosis.
The 2025 SEER Manual Sequence Number--Central Coding Instruction 1.a advises: A ‘reportable’ primary refers to the site/histology/behavior of the tumor and the years when reporting was required. Review of the reportability requirements in effect during the diagnosis year will be needed. |
2025 | |
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20250012 | Solid Tumor Rules/Histology--Lung: How is histology coded and which H Rule applies for a lung adenocarcinoma when the greatest percentage of the adenocarcinoma is stated to be, "solid; complex glands (cribriform and fused glands) (50%)"? See Discussion. |
In 01/2023, right lower lobectomy final diagnosis proved a single adenocarcinoma tumor with the histological patterns described as acinar (20%), papillary (30%) and solid; complex glands (cribriform and fused glands) (50%). There is no H Rule applicable to a complex glandular pattern adenocarcinoma. Is this equivalent to a solid predominant adenocarcinoma (8230) per Rule H7? Or is the predominant adenocarcinoma a mixed subtype coded as 8255 per Rule H9? |
Histology code 8255/3 best identifies this histology. Complex glands in lung tumors are often associated with a poor prognosis and represent a high-grade pattern in lung cancer grading systems. This histology is not currently recognized as a variant by WHO. |
2025 |
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20250016 | Reportability--Head & Neck: Are high-grade squamous dysplasia / “severe” squamous dysplasia or glandular intraepithelial neoplasia reportable for all Head & Neck subsites? If so, what year did they become reportable? In reviewing SINQ 20240003, 20230047, and 20230046, it appears that at least the larynx, mandible, and tongue have been reportable since 2021. However, 8077/2 and 8148/2 histology codes are not included in the Solid Tumor Rules (STRs) (2025 update) for Head and Neck, either in Tables 1-9 or the H Rules. |
High grade squamous dysplasia (8077/2) is reportable for head and neck sites for cases diagnosed as of 01/01/2021. High grade glandular intraepithelial neoplasia / glandular intraepithelial neoplasia grade III (8148/2) and high grade squamous intraepithelial neoplasia / squamous intraepithelial neoplasia grade III (8077/2) are reportable for head and neck sites for cases diagnosed as of 01/01/2001. Refer to other standard setters’ criteria for reportability as appropriate. |
2025 | |
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20250007 | Reportability/Behavior: Our registry collects some borderline (behavior /1) cases that are not reportable to SEER or any other standard setters. Can we assign a behavior code of /2 to these cases? |
Do not assign a behavior code of /2 to these cases unless you have a way to flag them so that they are not reported to the standard setters as in situ cases. Work with your state central registry to ensure that these cases are not unintentionally included in state case submission. |
2025 | |
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20250021 | Reportability--Heme & Lymphoid Neoplasms: Is a diagnosis of smoldering Waldenström macroglobulinemia (WM) reportable? See Discussion. |
The bone marrow was involved by lambda-restricted atypical B-cell and plasma cell populations with MYD88 mutation. Together these populations represent 10-15% of the bone marrow cellularity. While the bone marrow biopsy pathology alone did not provide a reportable diagnosis, the oncologist clinically diagnosed this as smoldering WM in the medical record. Is a diagnosis of smoldering WM similar to a diagnosis of smoldering multiple myeloma (MM), a reportable Heme neoplasm, since smoldering neoplasms may be considered to meet the neoplasm’s threshold in the bone marrow but is otherwise asymptomatic? |
Report smoldering WM (9761/3) using the Hematopoietic and Lymphoid Neoplasms Manual and Database (Table B9). Smoldering WM is defined as a poorly described asymptomatic disorder with a high risk of progressing to symptomatic WM requiring treatment. The term “smoldering” refers to the process meaning it is progressing, perhaps slowly, or even at a slower pace than might be expected. Smoldering WM resembles smoldering MM. |
2025 |
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20250002 | Reportability/Histology--Soft Tissue: Is superficial CD34 positive fibroblastic tumor reportable and if so what histology code should be used? See Discussion. | Patient had a left thigh soft tissue mass excision on 7/24/24 and was diagnosed with superficial CD34 positive fibroblastic tumor. Margins were narrowly free of disease. Tumor size was 5.5 cm x 4.4 cm x 3.9 cm. The diagnosis was confirmed. |
Do not report superficial CD34-positive fibroblastic tumor (8810/1) of the thigh. WHO Classification of Soft Tissue and Bone Tumors, 5th ed., defines superficial CD34-positive fibroblastic tumor as a distinctive low-grade neoplasm of the skin and subcutis, most frequently occurring in the lower extremities, especially thigh, followed by arm, buttock, shoulder, and rarely, vulva. |
2025 |
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20250011 | Reportability--Liver: Is a 2023 cholangiocarcinoma case with Liver Imaging Reporting And Data System (LI-RADS) M (LR-M) lesion on imaging reportable? |
Report LR-M unless there is information to the contrary. The American College of Radiology defines LR-M as "probably or definitely malignant, not necessarily hepatocellular carcinoma (HCC)." |
2025 |
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