Home
| Report | Question ID | Question | Discussion | Answer | Cancer Site Category | Data Item Category | Year |
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20210039 | Multiple primaries/Heme & Lymphoid Neoplasms--Lymphoma: Is a 2021 right tongue base biopsy showing diffuse large B-cell lymphoma (DLBCL) (9680/3) a new primary following a prior history of hairy cell leukemia-variant (HCL-v) (9591/3) in 2011? See discussion. |
Patient was diagnosed with low-grade non-Hodgkin lymphoma in 2011, later classified as hairy cell leukemia-variant. Right cervical node biopsy in 2020 proved HCL-v and a subsequent 2021 right tongue base biopsy showed DLBCL. The tongue base biopsy path includes the comment, patient has history of HCL-v, but the morphology and flow cytology features are different from the patient's previous right cervical node biopsy. This DLBCL likely represents a second de novo lymphoma, but cannot exclude an unusual transformation of the prior HCL-v. Per Heme Rule M7, abstract a single primary when a more specific histology is diagnosed after an NOS if the Heme DB confirms the same primary. The histology code for HCL-v, 9591/3 is a non-specific code, but it seems like a specific histology. The Heme Calculator does say 9591 and 9680 are the same primary, but we are unsure if that is correct for this case of HCL-v followed by DLBCL. |
UPDATED JUNE 2026 Abstract two primaries. This is a transformation from a chronic disease (the Hairy Cell Variant) to an acute disease (DLBCL). Per the abstractor notes for 9591/3 (which includes the term Hairy cell leukemia variant) "Hairy cell leukemia variant (pleomorphic, prolymphocytic, thrombocytic) can transform to Diffuse Large B-cell lymphoma (9680/3)." |
Heme & Lymphoid Neoplasms, Lymphoma | N/A | 2021 |
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20250015 | 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. |
In previous STR versions and the ICD-O-3.2, SFT/hemangiopericytoma, WHO G1 is 8815/0 and only SFT/hemangiopericytoma, WHO G2 was 8815/1. However, Table 6 (Non-Malignant CNS, Specific Histologies, NOS, and Subtypes/Variants) was changed in the 2025 updates to indicate both G1 and G2 SFT/hemangiopericytoma are 8815/1. No date range was provided for this change in the STR and the behavior of this tumor was not updated by the standard setters in other references (i.e., ICD-O-3.2). The behavior of G1 SFT/hemangiopericytoma was not updated in the 2025 ICD-O-3.2 updates. If the ICD-O-3.2 was the source of this change, should this have been documented in the 2025 NAACCR Implementation Guidelines? However, the 2025 NAACCR Implementation Guidelines indicates, "There are no ICD-O-3 changes for 2025." Is this behavior change in 2025 Solid Tumor Rules updates an error? Should the behavior of SFT/hemangiopericytoma, WHO G1 remain /0? |
Updated February 2026 For cases diagnosed 2025 and later: Assign behavior /1 for solitary fibrous tumor unless stated to be malignant or have metastasized. A review by the Cancer PathCHART expert neuropathologists found behavior code /0 is incorrect and both solitary fibrous tumor grade 1 and grade 2 are coded as 8815/1. WHO Classification of Central Nervous System Tumors, 5th edition, assigns behavior as /1 and no longer recommends terms solitary fibrous tumor/hemagiopericytoma and hemagiopericytoma. The STR table is correct. Future updates to ICD-O should reflect this behavior. WHO Classification of Tumours, Central Nervous System Tumours, 5th ed. was reviewed by the CPC expert pathologists for implementation for cases diagnosed January 1, 2025. Reminder: Comparing the CPC Validity Status included in the 2024 CPC*Search to that included in the 2025 SMVL (that table that drives the edits) is incorrect. CNS Tumors were not reviewed for 2024 implementation, they were reviewed for 2025 implementation. There will be a 2025 CPC*Search and a /1 will be designated as a Valid. |
Brain and CNS | Behavior | 2025 |
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20170043 | Reportability--Ovary: Is ovarian mucinous borderline tumor of intestinal type (referred to as gastrointestinal type differentiation) with microinvasion reportable? If reportable, what is the histology? See Discussion. |
4/18/17 Right ovary and fallopian tube, salpingo-oophorectomy: mucinous borderline tumor of intestinal type with microinvasion; greatest dimension 24.5 cm. Left fallopian tube and ovary, salpingo-oophorectomy: Benign ovary with multiple benign Mullerian inclusions. Benign fallopian tube with multiple paratubal cysts. Per pathology: pT1a pNx. |
Updated December 2025 For an ovarian mucinous borderline tumor, the term "microinvasion" is not an indication of malignancy according to the WHO Female Genital Tumors, 5th edition, and our expert pathologist consultant agrees. Therefore, borderline mucinous ovarian tumor with microinvasion is not reportable. Low malignant potential/borderline ovarian tumors are defined by the pathology of the primary tumor in the ovary, and microinvasion there, or invasion in implants does not change that diagnosis. The only exception is when the lymph nodes are positive for malignancy, the case is reportable. If the lymph nodes are positive for mucinous borderline tumor, the case is not reportable. Similarly, serous borderline tumor with microinvasion, unless the morphology resembles low grade serous carcinoma and invasion measures <5 mm in a single focus, is not reportable. |
Ovary | Histology | 2017 |
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20031173 | First Course Treatment/Hormone Therapy--Thyroid: Is hormone replacement therapy such as levothyroxine (Synthroid) for thyroid carcinoma coded as first course of treatment? See Discussion. |
Examples: Patient was admitted for thyroidectomy with a diagnosis of probable thyroid cancer. Patient's history stated that patient received work-up for hypothyroidism and was found to have thyroid nodule. Fine needle aspirate suggested carcinoma. Patient's medications included Cytomel and Synthroid. Patient was given levothyroxine after thyroidectomy for medullary thyroid carcinoma. |
Updated December 2025 Do not code levothyroxine given to treat hypothyroidism or as cancer treatment for medullary carcinoma when given as replacement therapy and not as thyroid stimulating hormone (TSH) suppression therapy. Thyroid hormone therapy is generally coded as treatment for follicular, papillary, and oncocytic thyroid carcinomas. |
Thyroid | Hormone Therapy | 2003 |
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20120050 | Multiple primaries/Histology--Heme & Lymphoid Neoplasms: How many primaries are accessioned and what histology codes apply if a patient has a 1998 diagnosis of essential thrombocythemia and a recent clinical diagnosis of secondary myelofibrosis? See Discussion. | The patient has a history of essential thrombocythemia (ET) since 1998. This has been treated daily with aspirin. A recent bone marrow biopsy was consistent with myeloproliferative disorder with excess blasts, marked extensive reticulin marrow fibrosis with osteosclerosis, excess blasts (11%) in the marrow aspirate and peripheral blood. JAK2 mutation was present in a small minority of cells. The physician stated patient was, "considered to have secondary myelofibrosis and was started on Jakafi." | Updated April 2026 For cases diagnosed 2010 and forward, access the Hematopoietic Database (Heme DB) at http://seer.cancer.gov/seertools/hemelymph.
Per the Heme DB, entry Myelofibrosis, a secondary myelofibrosis is not a reportable case. Secondary myelofibrosis is not listed as a synonym for primary myelofibrosis in the Heme DB. The term "secondary myelofibrosis" means that the myelofibrosis was caused by, in this case, the essential thrombocythemia.
The diagnosis "consistent with myeloproliferative disorder" is also not a new reportable diagnosis. "Myeloproliferative disorder" refers to a group of diseases (an NOS category) that includes essential thrombocythemia, which was originally diagnosed in 1998, prior to reportability for this disease type.
SEER*Educate provides training on how to use the Heme Manual and DB. If you are unsure how to arrive at the answer in this SINQ question, refer to SEER*Educate to practice coding hematopoietic and lymphoid neoplasms. Review the step-by-step instructions provided for each case scenario to learn how to use the application and manual to arrive at the answer provided. https://educate.fhcrc.org/LandingPage.aspx. |
Heme & Lymphoid Neoplasms | Histology | 2012 |
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20190002 | Histology/Behavior--Brain and CNS: How should Histology and Behavior be coded for a polymorphous low-grade neuroepithelial tumor of the young (PLNTY) arising in the brain? |
Updated answer Assign code 9413/0. |
Brain and CNS | Behavior, Histology | 2019 | |
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20190072 | Solid Tumor Rules (2018)/Histology--Lung: What is the correct histology code for minimally invasive adenocarcinoma in the lung, 8140/3 or 8256/3? See Discussion. |
For example, 9/12/18 left lung upper lobe lobectomy: 1.5 cm, 0.8 cm invasive component, lepidic predominant adenocarcinoma with acinar and lepidic patterns, G2, no visceral pleural invasion, no LVI, 0/14 LNS positive. An additional minimally invasive adenocarcinoma, 1 mm, was seen away from the main tumor. The correct coding of the minimally invasive adenocarcinoma will ultimately determine if we have one tumor (using rule M7) versus two primaries (using rule M6). |
Updated answer: Code minimally invasive adenocarcinoma, NOS as 8140/3. This is a new term and code in the 2018 ICD-O-3 New Codes, Behaviors, and Terms-Updated 8/22/18 list. See Solid Tumor Lung Table 3, and Solid Tumor Lung rules H1 and H10. |
Lung | Histology | 2019 |
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20031100 | Date of diagnosis: Can a positive VMA:HVA test be used as a date of diagnosis for neuroblastoma? See Description. |
Rubin's Clinical Oncology states: Both the catecholamines and their metabolites are used as markers for neuroblastoma, with vanillylmandelic acid (VMA) and homovanillic acid (HVA) being the most commonly used. While their absolute values are not of prognostic significance, a higher VMA:HVA ratio suggests a better prognosis for patients with disseminated disease. |
Updated answer July 2024 No. Do not code the neuroblastoma diagnosis date from only the date of an elevated urine catecholamine test (VMA or HVA). Neuroblastoma diagnosis should be made on the basis of tissue biopsy or bone marrow aspiration along with elevated urinary catecholamines. Elevated urinary catecholamines alone are not diagnostic of neuroblastoma. |
N/A | Date of diagnosis | 2003 |
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20230059 | Histology--Heme and Lymphoid Neoplasms: How is histology coded for a diagnosis stated as MDS/AML (myelodysplastic syndrome/acute myeloid leukemia) per the international consensus classification (ICC)? See Discussion. |
The final diagnosis on bone marrow biopsy was high grade myeloid stem cell neoplasm, 17% blasts by differential count. The pathologist further states that this could be classified as “MDS with increased blasts (MDS-IB2) per the WHO 5th edition classification, or MDS/AML per the international consensus classification (ICC).” FISH and cytogenetics revealed a loss of 7q, but no other AML-related genetic abnormalities. The physician confirms the patient has MDS/AML. |
Updated Answer July 2024 Code histology as myelodysplastic neoplasm with increased blasts (9983/3) based on the WHO Classification of Hematolymphoid Tumors, 5th edition, Beta version 2. WHO lists MDS with increased blasts-2 (MDS-IB2) as a subtype of 9983/3. Terms coded to 9983/3 include
When differences exist between WHO and ICC, assign the histology based on the WHO Classification. |
Heme & Lymphoid Neoplasms | Histology | 2023 |
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20220042 | First Course Treatment/Radiation Therapy: How should Lutathera be coded? CoC states XRT- Radioisotopes and SEER states Other Treatment. |
Lutathera is a radioconjugate consisting of the tyrosine-containing somatostatin analog Tyr3-octreotate (TATE) conjugated with the bifunctional, macrocyclic chelating agent tetra-azacyclododecanetetra-acetic acid (DOTA) and radiolabeled with the beta-emitting radioisotope lutetium Lu 177 with potential antineoplastic activities. |
Update to the current manual: Code Lutathera as radiation (isotopes NOS code 13). We will make this change in the next version of the SEER manual. |
N/A | First course treatment, Radiation Therapy | 2022 |
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