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Serous tubal intraepithelial neoplasm (neoplasia) (STIN) is not equivalent to serous tubal intraepithelial carcinoma (STIC). Report STIN only when stated to be high grade. STIC is reportable. Do not report STIL.

According to our expert pathologist consultant, STIL and STIN are broad descriptive terms that reflect proliferation of epithelial cells with varying degrees of atypia, with the most developed, STIC, reflecting convincing neoplastic change.

We consulted with our expert hematopathologist who advised this is a single primary, Hodgkin lymphoma (9659/3).

The diagnosis from 5/14/2021 states NLPHL. It also states there is T-cell histiocyte rich large B-cell lymphoma-like transformation. The WHO Classification of Hematopoietic and Lymphoid Tissues demonstrates six different patterns to NLPHL, which are: A) 'classical' nodular, B) serpiginous/interconnected nodular, C) nodular with prominent extra-nodular LP cells, D) T-cell-rich nodular, E) diffuse with a T-cell-rich background, and F) diffuse, B-cell-rich pattern.

In this case, they are describing a NLPHL type E (diffuse with a T-cell rich background). The term used is "T-cell histiocyte rich large B-cell lymphoma-LIKE transformation. "Like" as used here means that it is like a transformation; if it was NLPHL transforming to T-cell histiocyte rich large B-cell lymphoma, it would not have the word "like" in the diagnosis. This is a variant of NLPHL and not an actual transformation to another lymphoma. Even though NLPHL can transform to T-cell histiocyte rich large B-cell lymphoma, it is not the case here since the word "like" appears in the diagnosis.

We will update the histology in the Hematopoietic and Lymphoid Neoplasm Database to include these additional patterns.

Abstract as multiple primaries per rule M8. There are bilateral fallopian tube primaries. It sounds like the "primary" tumor was identified in the right fallopian tube with bilateral spread of disease. Incidental STIC was also identifed in the left fallopian tube. Do not record the STIC as another primary.

Code the behavior to /3, not just to pass edits, but because this is an invasive case based on the positive lymph nodes.

For most cases, behavior is based on the primary tumor, but in situations like this where an invasive component cannot be found and there are positive lymph nodes, the /3 behavior is assigned based on the positive lymph nodes.

This is a correction to the SEER manual. Lymphomas originating in lymph nodes (C77) could have distant metastases to any site except lymph nodes. The following corrections to the manual apply now and will appear in the next version of the manual.

Remove C770-C779 from the instruction for assigning code 8 on the following pages.

Page 135 Mets at Dx--Bone

Page 137 Mets at Dx--Brain

Page 139 Mets at Dx--Liver

Page 141 Mets at Dx--Lung

Page 145 Mets at Dx--Other

Example

Biopsy of axillary lymph node: Diffuse Large B-Cell lymphoma. Lymph nodes involved above and below the diaphragm, multiple nodules seen in lung, lesions in liver. Bone marrow biopsy positive for DLBLC. Per Hematopoietic manual, primary site would be C778 for multiple lymph node regions involved.

Mets at Dx--Bone-0

Mets at Dx--Brain-0

Mets at Dx--Liver-1

Mets at Dx--Lung-1

Mets at Dx--Distant Lymph Nodes-8

Mets at Dx--Other-1

Carcinoma cuniculatum of the hard palate is reportable. Code to SCC, NOS (8070/3). Use text fields to record the details.

While WHO recognizes carcinoma cuniculatum to be a new variant of oral cancer, it has not proposed a new ICD-O code for this neoplasm.

Report retroperitoneal paraganglioma based on ICD-O-3.2 histology/behavior that lists paraganglioma, NOS as 8680/3 for cases diagnosed 2021 and forward. While GAPP is a predictor of metastatic potential, it does not factor into behavior, thus reportability.

We confirmed with our expert pathologist consultant that lymphovascular invasion and lymphovascular space invasion are synonymous.

Assign 8323/3, clear cell papillary renal cell carcinoma using the 2018 Kidney Solid Tumor Rules, Rule H1, as this is a single histology, a variant of renal cell carcinoma NOS.

Chrondrosarcoma, grade 1 (9222/1) is not reportable according to the Reportability section in the 2021 SEER Manual. The histology (9222/1) is listed in ICD-O-3.2 as a synonym for atypical cartilaginous tumor (preferred term).

In general, the tables do not include non-reportable terms and codes. Registrars should refer to their standard setter (to whom they submit data) for reportable neoplasms. Currently, /0 and /1 neoplasms are reportable for central nervous system sites only. ICD-O-3.2 includes all neoplasms but that does not mean they are reportable. If a facility collects non-malignant neoplasms, use the corresponding ICD-O code in 3.2.