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Report Produced: 05/25/2026 22:25 PM

Report Question ID Question Discussion Answer Year
20041036

Surgery of Primary Site/Surgery codes, NOS--Colon: What tissue specimens are included under this field's code 41 [Subtotal colectomy/hemicolectomy plus resection of contiguous organ; example: small bowel, bladder]? See Discussion.

How is site specific surgery coded for the following two cases?

Example 1. A right hemicolectomy normally includes a portion of ileum.

Example 2. Subtotal colectomy with bilateral oophorectomy.

Code 40 includes a right hemicolectomy. A right hemicolectomy normally includes a small portion of the terminal ileum removed with the ileocecal valve. Assign code 41 when resection of CONTIGUOUS organs goes beyond what would normally be removed as part of a subtotal colectomy/hemicolectomy. Record non-contiguous organ resection in Surgical Procedure of Other Site.

Example 1: Surgery of Primary Site -- 40 [Subtotal colectomy/hemicolectomy].

Example 2: Surgery of Primary Site -- 40 [Subtotal colectomy/hemicolectomy]. Surgical Procedure of Other Site -- 2 [Non-primary surgical procedure to other regional sites].

Addendum July 2021

For coding Surgical Procedure of Other Site, see the instructions for determining regional vs distant sites in the 2021 SEER manual under Coding Instructions #6 and #7 on pages 184-185. Do not use Summary Stage to determine regional vs distant for this data item.

 2004
20041037 Multiple Primaries (Pre-2007)/Histology (Pre-2007)/Grade, Differentiation--Thyroid: How many primaries, with what histologies should be coded when a thyroidectomy reveals "anaplastic carcinoma" and "papillary carcinoma" occurring as two separate tumors? See Discussion. Example: Thyroidectomy revealed anaplastic carcinoma of the thyroid with mets to lymph nodes. The path report stated that the thyroid specimen also contained a small papillary carcinoma. Differentiation for the papillary carcinoma was not stated.

For tumors diagnosed prior to 2007:

Accession and code as two thyroid primaries:

Anaplastic carcinoma [8021/34]

Papillary carcinoma [8260/39]

For tumors diagnosed 2007 or later, refer to the MP/H rules. If there are still questions about how this type of tumor should be coded, submit a new question to SINQ and include the difficulties you are encountering in applying the MP/H rules.

 2004
20041006 Multiple Primaries (Pre-2007)/Date of Diagnosis--Bladder: How is date of diagnosis coded when metastases consistent with a bladder primary are found more than a year after a diagnosis of non-invasive bladder cancer? See Description. A non-invasive papillary transitional cell carcinoma is removed by TURB in May 2002. In January 2003, a bone biopsy reveals metastatic transitional cell carcinoma consistent with bladder primary.

For tumors diagnosed prior to 2007:

Code a second bladder primary diagnosed in January 2003.

For tumors diagnosed 2007 or later, refer to the MP/H rules. If there are still questions about how this type of tumor should be coded, submit a new question to SINQ and include the difficulties you are encountering in applying the MP/H rules.

 2004
20041081 Reporting Source: Is an ER patient who is diagnosed on peripheral smear with an acute leukemia coded as an outpatient if the patient died while in the process of being admitted for treatment or is the patient coded as a death certificate case? Code reporting source as 1 [Hospital Inpatient/Outpatient or Clinic] for the case above. This case will be abstracted using information from the outpatient/ER record (and the death certificate). 2004
20041001

Histology (Pre-2007)--Pancreas: Should pancreatic neoplasia III (PanIN III) be coded to 8010/2 [carcinoma in situ, NOS] or 8500/2 [Ductal carcinoma in situ]? See Description.

There is no specific morphology code for PanIN-III in the ICD-O-3. In the chapter for exocrine pancreas found in the sixth edition of AJCC cancer staging manual, pg 160, reference is made to PanIN-III and its inclusion with carcinoma in situ.

For tumors diagnosed prior to 2007:

Code PanIN-III (pancreatic intraepithelial neoplasia III) as 8500/2 [Ductal carcinoma in situ, includes DIN 3: Ductal intraepithelial neoplasia 3]. PanIN-III is a synonym for carcinoma in situ according to the WHO classification of Tumors and the College of American Pathologists' Protocol for exocrine pancreas. Do not code PanIN-I or PanIN-II as cancer.

For tumors diagnosed 2007 or later, see SINQ 20110081 and refer to the MP/H rules. If there are still questions about how this type of tumor should be coded, submit a new question to SINQ and include the difficulties you are encountering in applying the MP/H rules.

2004
20041100 Sequence Number-central/Multiple Primaries (Pre-2007): What criteria are to be used to determine which primary site carries a worse prognosis? Should we take survival into consideration? See Discussion.

In the case of two or more simultaneously diagnosed primary tumors, instructions in the SEER manual state that the tumor with the worse prognosis is to be assigned the lower sequence number. Prognosis decisions should be based on primary site, histology and extent of disease.

Stage as a criteria for decision making is fairly straightforward. On the other hand, decisions based on primary site seem to be more subjective than objective.

For tumors diagnosed prior to 2007:

Compare the combination of the primary site, histology and extent of disease for each primary, and assign the lowest sequence number to the primary with the worst prognosis. Do not use primary site or histology alone to determine prognosis in the case of assigning sequence number. Survival is a component of prognosis.

If there is no difference in prognosis, assign the sequence numbers in any order.

For tumors diagnosed 2007 or later, refer to the MP/H rules. If there are still questions about how this type of tumor should be coded, submit a new question to SINQ and include the difficulties you are encountering in applying the MP/H rules.

 2004
20041023 Histology (Pre-2007)--Lung: Should "moderately differentiated adenocarcinoma of scar type, intermixed with bronchiolo-alveolar carcinoma" be coded to 8250 [bronchiolo-alveolar adenocarcinoma, NOS] or 8255 [adenocarcinoma of mixed subtypes]?

For tumors diagnosed prior to 2007:

Code Histology to 8255 [Adenocarcinoma with mixed subtypes]. This is a single tumor containing both a scar carcinoma and a bronchiolo-alveolar carcinoma--use 8255. The synonym for 8255 is adenocarcinoma combined with other types of carcinoma (not just subtypes).

For tumors diagnosed 2007 or later, refer to the MP/H rules. If there are still questions about how this type of tumor should be coded, submit a new question to SINQ and include the difficulties you are encountering in applying the MP/H rules.

 2004
20041022 Primary site/Histology (Pre-2007)/Behavior: What is the correct site and histology/behavior for the following diagnosis: "mucinous cystadenoma of the appendix with perforation and pseudomyxoma peritonei." This was diagnosed at e-lap for a separate adenocarcinoma of the ascending colon.

For tumors diagnosed prior to 2007:

The appropriate code for mucinous cystadenoma of the appendix with perforation and pseudomyxoma peritonei is C18.1 8470/0. It is not reportable to SEER. According to our pathologist consultant, mucinous cystadenoma is a legitimate term for such appendiceal tumors. They may implant all over the peritoneum as pseudomyxoma peritonei, especially in the face of perforation, without being histologically malignant.

For tumors diagnosed 2007 or later, refer to the MP/H rules. If there are still questions about how this type of tumor should be coded, submit a new question to SINQ and include the difficulties you are encountering in applying the MP/H rules.

 2004
20041049 Histology (Pre-2007): What code is best used to represent a diagnosis of "metaplastic carcinoma, matrix producing type." The tumor shows poorly differentiated infiltrating duct carcinoma and myxoid, cartilaginous stroma.

For tumors diagnosed prior to 2007:

Code the histology to 8575 [metaplastic carcinoma, NOS]. According to the WHO Classification of Tumors of the Breast and Female Genital Organs, metaplastic carcinoma is a type of epithelial breast tumor. Matrix producing carcinoma is a synonym of metaplastic carcinoma. ICD-O-3 does not have a code for matrix producing carcinoma.

For tumors diagnosed 2007 or later, refer to the MP/H rules. If there are still questions about how this type of tumor should be coded, submit a new question to SINQ and include the difficulties you are encountering in applying the MP/H rules.

 2004
20041012 Multiple Primaries (Pre-2007)--Colon: What is the number of primaries for a case of familial polyposis with at least three separate tumors having invasive adenocarcinoma, one in the rectum? See Discussion. A patient had a total proctocolectomy and was found to have familial polyposis. At least 3 separate tumors were identified with invasive adenocarcinoma, one of which was in the rectum. Is this 2 primaries: C18.9 with 8220/3 and C20.9 with 8140/3 or is this all one primary cancer?

For tumors diagnosed prior to 2007:

Familial polyposis is always a single primary. Code the primary site for the case example above to C199 [colon and rectum].

For tumors diagnosed 2007 or later, refer to the MP/H rules. If there are still questions about how this type of tumor should be coded, submit a new question to SINQ and include the difficulties you are encountering in applying the MP/H rules.

 2004