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This is a single primary, essential thrombocythemia [9962/3] diagnosed in 2007. The 2010 Heme DB and Manual should not have been used to determine the number of primaries in this case. The Heme DB applies only to cases diagnosed 2010 and later.

In order to determine the number of primaries, use the rules in place at the time of the subsequent 2009 diagnosis of primary myelofibrosis. Per the Single Versus Subsequent Primaries of Lymphatic and Hematopoietic Diseases table, a diagnosis of essential thrombocythemia [9962/3] followed by a diagnosis of primary myelofibrosis [9961/3] is a single primary.

Code the primary site to C179 [small intestine, NOS] for multiple invasive tumors of the small intestine accessioned as a single primary.

The steps used to arrive at this decision are:

Step 1: Go to the Primary Site subsection located in Section IV of the 2012 SEER Manual titled "Description of This Neoplasm."

Step 2: Apply instruction 5. "Code the last digit of the primary site code to '9' for single primaries, when multiple tumors arise in different subsites of the same anatomic site and the point of origin cannot be determined." Code the primary site to C179 [small intestine, NOS].

When multiple tumors arising in different subsites are accessioned as a single primary, the primary site is coded to the NOS code, in this case small intestine, NOS [C179]. The level of invasion does not determine the primary site, unless one or more of the tumors is in situ and another is invasive.

For cases diagnosed 2007 or later, accession a single primary, left upper lobe squamous cell carcinoma diagnosed 7/27/2007.

The steps used to arrive at this decision are:

Go to the General Information notes for Determining Multiple Primaries for Solid Malignant Tumors in the Multiple Primary and Histology Coding Rules Manual.

General Information Rule 7 states "Use the multiple primary rules as written unless a pathologist compares the present tumor to the "original" tumor and states that this tumor is a recurrence of cancer from the previous primary."

Accession a single primary. Do not apply the Multiple Primary rules because the pathologist compared the 2007 and 2010 slides and determined this was a recurrence and not a new primary.

For cases diagnosed 2010 and forward, access the Hematopoietic Database at http://seer.cancer.gov/seertools/hemelymph.

This case should be accessioned as two primaries per Rule M13. Code the histology for the 7/31/08 diagnosis to 9680/3 [diffuse large B-cell lymphoma] and the code the histology for the 10/14/2010 diagnosis to 9698/3 [follicular lymphoma, grade 3A of 3]. Rule M13 applies to this case because the neoplasm was originally diagnosed in the blast or acute phase (DLBCL) and reverted to a less aggressive or chronic phase (follicular lymphoma) after treatment.

Per the "Transformations to" section in the Heme DB for follicular lymphoma, grade 3 transforms to diffuse large B-cell lymphoma [9680/3]. This means that the follicular lymphoma is the chronic neoplasm and that DLBCL is the acute neoplasm. In this case, the chronic neoplasm was diagnosed after the acute neoplasm was diagnosed and treated (with chemotherapy).

Do not Stop at Rule M4 because diffuse large B-cell lymphoma and follicular lymphoma (both NHL's) were not present in the same node(s) AT THE SAME TIME.

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.

For cases diagnosed 2010 and forward, access the Hematopoietic Database at http://seer.cancer.gov/seertools/hemelymph.

This case should be accessioned as two primaries per Rule M11. Code the histology of one primary to 9680/3 [diffuse large B-cell lymphoma], the acute neoplasm. Code the histology for the second primary to 9823/3 [chronic lymphocytic leukemia/small lymphocytic lymphoma], the chronic neoplasm.

Per Rule M11, abstract as multiple primaries when both a chronic and acute neoplasm are diagnosed simultaneously or less than or equal to 21 days apart AND there is documentation of two pathology specimens, one confirming the chronic neoplasm (bone marrow biopsy) and one confirming the acute neoplasm (stomach biopsy).

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.

For cases diagnosed 2007 or later, code the histology as lobular carcinoma, in situ [8520/2].

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). Go to the Breast Histo rules because site specific rules exist for this primary.

Start at the SINGLE TUMOR: IN SITU CARCINOMA ONLY module, Rule H1. The rules are intended to be reviewed in consecutive order. Stop at the first rule that applies to the case you are processing. Code the histology to lobular carcinoma in situ [8520/2] because this is the only histologic type identified.

Pleomorphic lobular carcinoma is a variant of lobular carcinoma which does not have an ICD-O-3 code. It is still a lobular carcinoma. The identification of the variants of lobular carcinoma was a relatively recent discovery and the information was not available when the 2007 MP/H Rules were written. All of the lobular variants will be included in the next revision of the MP/H Rules.

Code the histology as adenocarcinoma, NOS [8140/3].

For cases diagnosed 2007 or later, 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 Colon Histology rules to determine the histology code for this case. The Module you use depends on the behavior and number of tumors identified in the primary site.

Start at the MULTIPLE TUMORS ABSTRACTED AS A SINGLE PRIMARY Module Rule H15. The rules are intended to be reviewed in consecutive order from Rule H15 to Rule H24. Stop at the first rule that applies to the case you are processing. Code the histology when only one histologic type is identified. In this case, the only histology present was adenocarcinoma, NOS [8140/3].

Rules H17 through H21 do not apply in this case because there is no malignancy arising in any of the adenomas or polyps scattered throughout the colon.

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.

For cases diagnosed 2010 and forward, access the Hematopoietic Database at http://seer.cancer.gov/seertools/hemelymph.

Code the histology to 9680/3 [diffuse large B-cell lymphoma (DLBCL)].

For CLL (and CLL/SLL), Richter's transformation represents when CLL changes into DLBCL. In this case, there was a biopsy that demonstrated a diagnosis of the chronic disease (CLL/SLL) transforming (Richter's transformation) into an acute disease DLBCL.

Per Rule M8, one is instructed to abstract the acute neoplasm as a single primary when both a chronic (CLL/SLL) and an acute neoplasm (diffuse large B-cell lymphoma (DLBCL)) are diagnosed simultaneously there is documentation of only one positive bone marrow biopsy, lymph node biopsy or tissue biopsy.

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.