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Rule M13 applies, abstract as two primaries. Since both DLBCL and FL were present in 2011, rule M2 does not fit -- not a single histology. Rule M13 reflects the situation in this case much better: an acute neoplasm which was treated and a chronic neoplasm diagnosed later.

Code the Grade, Differentiation field to 9 [cell type not determined, not stated or not applicable]. For lymphomas, do not code the descriptions "high grade," "low grade," and "intermediate grade" in the Grade, Differentiation field. These terms refer to categories in the Working Formulation and not to histologic grade for lymphoma histologies.

Generally, for histologies other than Non-Hodgkin lymphoma, the Grade, Differentiation field is coded to 2 [low grade], 3 [intermediate grade] and 4 [high grade] for most cancers.

Accession as multiple primaries using Rule M7 of the Solid Tumor Rules for Non-Malignant Central Nervous System that says to assign multiple primaries for cerebral meninges C700 AND spinal meninges C701. The Non-malignant CNS H coding section, Priority Order for using Documentation to Identify Histology" lists final DX and synoptic report as requried by CAP as being equal in priority. Use whichever report provides more specific information. See the General Instructions, page 13.

Both examples are multiple primaries.

Example 1: The 2018 lesion is a new tumor. Abstract multiple primaries based on 2018 Other Sites Solid Tumor Rules, Rule M10, when tumors are diagnosed more than one year apart.

Example 2: 2017 diagnosis showed complete response to treatment. 2019 lesion is a new primary based on timing.

The General Instructions of the Solid Tumor Rules instruct: Do not use a physician's statement to decide whether the patient has a recurrence of a previous cancer or a new primary. Each scenario should be evaluated separately using the rules as a guide.

Lymphangioma of the brain or CNS is not reportable. Lymphangioma is a malformation of the lymphatic system. Even though it has an ICD-O-3 code, do not report it.

As of January 1, 2021

Non-invasive follicular thyroid neoplasm with papillary-like nuclear features (NIFTP) C739 is no longer reportable for cases diagnosed 1/1/2021 forward. See the ICD-O-3.2 material on the NAACCR website,https://www.naaccr.org/icdo3/#1582820761121-27c484fc-46a7

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Answer for cases diagnosed 1-1-2017 to 12/31/2020

Report NIFTP and assign ICD-O-3 morphology code 8343/2. See the NAACCR document, page 3, https://20tqtx36s1la18rvn82wcmpn-wpengine.netdna-ssl.com/wp-content/uploads/2017/01/What-You-Need-to-Know-for-2017.pdf

For cases diagnosed 2007 or later, accession two primaries, serous carcinoma of the right ovary and serous tubal intraepithelial carcinoma of the left fallopian tube based on the information provided.

The steps used to arrive at this decision are:

Open the Multiple Primary and Histology Coding Rules Manual. Choose one of the three formats (i.e., flowchart, matrix or text) and go to the Other Sites MP rules because neither the ovary nor fallopian tube have site specific rules developed.

Start at the MULTIPLE TUMORS module, Rule M3. The rules are intended to be reviewed in consecutive order within a module. The patient has multiple tumors with ICD-O-3 topography codes that are different at the third character (Cxx) and therefore this case should be accessioned as a multiple primary.

It could be helpful to know the extent of involvement noted prior to neoadjuvant therapy and debulking surgery. For example, if the patient had widely metastatic disease throughout the entire pelvis prior to the initiation of treatment, the answer may have been different.

The terms "bordering on" and "may represent" are not diagnostic of cancer. These terms are not on the list of ambiguous terms that constitute a diagnosis of cancer. The diagnosis in the example above is not reportable to SEER.

Code the Grade, Differentiation field to 1 [grade I] using the information from the BR score.

For cases diagnosed 1998-2003: Grade or differentiation information from breast pathology reports is used in the following priority order:

1. Terminology (well, moderately, poorly)

2. Histologic grade (grade I, grade II)

3. BR scores

4. BR grade

5. Nuclear grade

On the hierarchical list for coding breast grade, the first two priorities do not apply to this case, but the third (Bloom-Richardson scores) does. Add the BR information (2+1+1) for a total score of 4, which translates to BR low grade (code 1). The statement of "II/III" may be a typo that should state I/III.