System Guide
Back to Search Results

Search Results

Display Options
Display Options
Select Fields
Export Results to CSV Create Report 0
+ Add all results to report

Report Produced: 05/27/2026 02:22 AM

Report Question ID Question Discussion Answer Year
20051058 Primary Site/Histology (Pre-2007)--Rectum: How are rectal biopsies with the histology of "poorly differentiated carcinoma with mixed basaloid and squamous features" coded if, per the SEER site/histology validation table, the histology 8094/3 [basosquamous carcinoma] histology cannot be coded to the rectum for the primary site?

For tumors diagnosed prior to 2007:

Code primary site C209 [rectum] and histology 8094/3 [basosquamous carcinoma]. As of 6/9/2003, this is no longer an impossible site/histology combination.

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.

 2005
20130185

Reportability/Behavior: Is HGSIL (high grade squamous intraepithelial lesion) of the vulva or vagina reportable and is it a synonym for histology code 8077/2 [squamous intraepithelial neoplasia, grade III]?

For cases diagnosed 2018 and later

HGSIL of the vulva or vagina is reportable. HGSIL is a synonym for squamous intraepithelial neoplasia, grade III.

 2013
20031098 Multiple Primaries (Pre-2007)/Date of diagnosis--Cervix: How is this field coded when initially carcinoma in situ is diagnosed by biopsy and at a later date invasive tumor is found pathologically?

For tumors diagnosed prior to 2007:

Since carcinoma in situ of the cervix is not reportable to SEER (as of 1/1/1996), the diagnosis date is the date of the invasive diagnosis.

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
20081046 MP/H Rules--Corpus uteri: How is histology coded for an endometrial tumor described as an "endometrioid adenocarcinoma with prominent squamous metaplasia"?

For cases diagnosed 2007 or later:

Endometrioid adenocarcinoma with squamous metaplasia is coded 8570 [Adenocarcinoma with squamous metaplasia]. This falls under the Histology Coding Rules for Other Sites, rule H17. The code for Endometroid adenocarcinoma is 8380. The code for Adenocarcinoma with squamous metaplasia is 8570. The histology with the numerically higher ICD-O-3 code is Adenocarcinoma with squamous metaplasia -- 8570.

 2008
20110059

Histology: How do you code histology for "malignant myopericytoma"?

Report malignant myopericytoma as 8824/3 for cases diagnosed 2021 and later.

 2011
20140032

Histology--Breast: Please confirm the morphology code for a diagnosis of "encapsulated papillary carcinoma" of the breast. Several articles on the internet lead me to believe it is the same as an intracystic carcinoma, code 8504/2 (our case shows no evidence of invasion).

You are correct in coding 8504/2 for this case. Per the 4th Edition WHO Tumors of the Breast, encapsulated papillary carcinoma (EPC) of the breast is synonymous with intracystic or encysted papillary carcinoma. It is a variant of ductal carcinoma in situ (DCIS).

 2014
20051026 Surgery of Primary Site--Skin: What surgery code is used to reflect the amputation of a finger for subungual melanoma? 47 [Wide excision or reexcision of lesion or minor (local) amputation with margins greater than 2cm] is the correct surgery code for amputation of a finger for melanoma. 2005
20081051 MP/H Rules/Histology--Prostate: Path said adenocarcinoma of the prostate with an endometroid adenocarcinoma component. What histology code is used?

For cases diagnosed 2007 or later:

Assign code 8500 [duct carcinoma].

According to The World Health Organization (WHO), the term endometrioid carcinoma of the prostate is now called Prostate Duct Carcinoma.

Using Rule H11 (one type), code 8500 (duct carcinoma) for this rare type of tumor. Do not stop at Rule H10 because this is not acinar.

 2008
20031128 Histology (Pre-2007): What code is used to represent the histology "PD infiltrating duct ca with focal sarcomatoid pleomorphic features?"

For tumors diagnosed prior to 2007:

Code histology as 8500/33 [Infiltrating duct carcinoma, poorly differentiated]. "Features" is a term from the list indicating a majority of the tumor, however; in this case "features" is modified by "focal" which does not indicate a majority of the tumor.

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
20160047

Reportability--Eye: Is conjunctival intraepithelial neoplasia (CIN III) from an excision of the left eye conjunctiva reportable?

Conjuctival intraepithelial neoplasia grade III (CIN III) is reportable. Intraepithelial neoplasia, grade III, is listed in ICD-O-3 as /2. It is reportable for sites other than skin.

2016