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Report Produced: 12/17/2025 13:29 PM

Report Question ID Question Discussion Answer Year
20031154 Date of Diagnosis/Histology (Pre-2007)/Behavior--Melanoma: How are these fields coded when the first shave biopsy finds "what appears to be the top of a melanoma" and a subsequent shave biopsy finds "features consistent with lentigo maligna?"

For tumors diagnosed prior to 2007:

Evaluate each case using all available information, including all pathology reports. Use the date of the first biopsy because it did identify the melanoma. The second biopsy confirmed the histologic type.

According to WHO's Histological Typing of Skin Tumors, lentigo maligna melanoma is similar to lentigo maligna, but has dermal invasion by atypical melanocytes.

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.

 2003
20031053 Reportability/History (Pre-2007)/Behavior Code--Ovary: Should the matrix principal in Rule F be applied to code a 2002 right ovary case to 8462/3 [Papillary serous borderline ovarian tumor] when peritoneal washings reveal the same histology?

For tumors diagnosed prior to 2007:

Do not apply the matrix principle in this case. This ovarian tumor is not reportable (behavior /1 per ICD-O-3). The peritoneal washings reveal the same histology (/1), rather than malignant cells. Based on the information provided, there is no evidence to support changing the behavior code.

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.

 2003
20000478 Multiple Primaries (Pre-2007)--Breast: When a breast cancer is treated with less than a total mastectomy and more than 2 months later a tumor of the same histology is diagnosed in the same breast with no statement of "recurrence," is this a new primary?

For tumors diagnosed prior to 2007:

Count as 2 primaries when a subsequent malignant breast tumor is diagnosed more than 2 months later unless stated to be a recurrence. For cases diagnosed after 1/1/94, an in situ followed by an invasive breast cancer is counted as two primaries even if stated to be a recurrence.

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.

 2000
20041047 Multiple primaries (Pre-2007)/EOD-Extension--Fallopian Tube: How many primaries are coded when endometrioid adenocarcinoma involves bilateral fallopian tubes? See Discussion. The pathologist states "because of the intimate association with the luminal line of the fallopian tube it is felt that this represents synchronous primaries rather than mets." The SEER Code Manual only lists ovary, retinoblastomas, and Wilms Tumors under the bilateral code stated to be a single primary.

For tumors diagnosed prior to 2007:

Complete two abstracts, one for left fallopian tube and one for right fallopian tube. This case has been determined to be two primaries by the pathologist. Bilateral involvement of paired sites (other than ovary, retinoblastoma and Wilms tumor) with the same histology within two months requires a determination of whether there are one or two primaries. The pathologist in the case above has made this determination.

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
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
20021087 Multiple Primaries (Pre-2007)--Head & Neck: How many primaries are represented when a1998 invasive squamous cell carcinoma of the true vocal cord is followed by a 1999 diagnosis of in situ squamous cell carcinoma of the true vocal cord (called "recurrent" by the clinician), and in 2001 there is another invasive squamous cell carcinoma of the true vocal cord (no statement of recurrence)? Would your answer be any different if no statement of "recurrent" had been made in 1999?

For tumors diagnosed prior to 2007:

Code this case as two primaries, an invasive true vocal cord primary in 1998 and another invasive true vocal cord primary in 2001.

If there had been no statement of recurrence for the 1999 in situ diagnosis and the 1999 diagnosis was more than two months following the 1998 diagnosis, this case would be coded as three primaries.

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.

 2002
20000513 Multiple Primaries/Histology (Pre-2007)--Bladder: What code is used to represent the histology and how many primaries should be coded for a TURB specimen that demonstrates carcinoma in situ, Grade I to II papillary transitional cell carcinoma, and high grade transitional cell carcinoma? See discussion.

Pathology report:

A. Biopsy, bladder neck, @ 6:00: Carcinoma in situ

B. Biopsy, Bladder wall, lateral, left:

1. Papillary carcinoma (Grade I-II)

2. Loose fragments of high-grade transitional carcinoma

C. Biopsy, Bladder neck @ 5:00: Carcinoma in situ

D. Biopsy, Bladder neck @ 7:00: Cystitis Glandularis

E. Biospsy, Bladder wall, posterior: Papillary carcinoma (Grade I)

For tumors diagnosed prior to 2007:

Code this case as one primary and code the Histology and Grade, Differentiation fields to 8130/34 [papillary transitional cell carcinoma, high grade].

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.

 2000
20021156 Primary Site/Histology (Pre-2007): What codes are used to represent site and histology for BSO specimen with a diagnosis, "Left and right adnexa: poorly differentiated serous carcinoma. Comment: The carcinoma occurs as multiple nodules within adnexal soft tissues. Direct involvement of ovaries is not seen, supporting an extraovarian origin." See discussion. Per our pathologist consultant, the site should be pelvic peritoneum [C481] and the histology is primary serous papillary carcinoma of peritoneum [8461/3]. Does SEER agree?

For tumors diagnosed prior to 2007:

Code the Primary Site to C481 [Specified parts of peritoneum] and the Histology field to 8461/3 [primary serous papillary carcinoma of peritoneum].

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.

 2002
20021077 Histology (Pre-2007)/Primary Site/EOD-Extension--All Sites: How do you code these fields for a resected thyroid that is negative for any diagnostic abnormality and a left ovary that demonstrates "papillary thyroid carcinoma arising in a cystic teratoma"? See discussion. Teratomas occurring in the ovaries frequently contain various types of fully differentiated tissue that normally occur in other body parts. Should the primary be coded to the ovary or to the organ in which that type of tissue normally occurs?

For tumors diagnosed prior to 2007:

Code the Primary Site field to the organ in which the cancer arose. For this tumor, code the Primary Site field to C56.9 [ovary] and Histology to 8260/3 [papillary carcinoma of thyroid]. Use the ovary EOD for tumors diagnosed 1998-2003.

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.

 2002
20020016 Primary Site (Pre-2007)--Prostate/Prostatic Urethra: What code is used to represent primary site for an "adenocarcinoma with spindle cell differentiation" of the prostatic urethra?

For tumors diagnosed prior to 2007:

Code the Primary Site field to C61.9 [prostate] because the histology is adenocarcinoma.

When a malignancy is identified in the prostatic urethra, look at the histology to determine the primary site. If it is a transitional cell carcinoma, code the Primary Site field to C68.0 [urethra] and if it is an adenocarcinoma, code to C61.9 [prostate].

The EOD scheme is ultimately collapsed into the TNM scheme. The TNM system differentiates between adenocarcinoma of the prostate and transitional cell carcinoma of the urethra. Only adenocarcinoma of the prostate is staged by the prostate scheme. Transitional cell carcinoma of the prostatic urethra is coded to C68.0 [urethra] and staged with that scheme.

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.

 2002