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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.

For cases diagnosed 1998-2003: If 7mm is the measurement of the infiltrating duct portion of this cancer, assign extension code 13 [Invasive and in situ components present, size of invasive component stated and coded in Tumor Size].

If 7mm is the size of the whole malignancy and the size of the invasive portion cannot be determined, assign extension code 14 [Invasive and in situ components present, size of entire tumor coded in Tumor Size (size of invasive component not stated) and in situ described as minimal (less than 25%)]. "Focal areas of in situ carcinoma" qualifies as minimal.

This answer was provided in the context of CSv1 coding guidelines. The response may not be used after your registry database has been converted to CSv2.Accept your registrars' codes at your discretion. It is encouraged, but not required, to enter text for CS data elements. These cases do not automatically default to code 999.

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.

Code Primary Site for cases 1 and 2 above to C023 [Anterior 2/3 of tongue, NOS]. Code lateral tongue without mention of dorsal or ventral surface to C023 [Anterior 2/3 of tongue, NOS].

Code Primary Site for case 3 to C022 [Ventral surface of tongue]. The underside of the tongue is specified as the site of the biopsy in case 3.

This answer was provided in the context of CSv1 coding guidelines. The response may not be used after your registry database has been converted to CSv2.Code CS Extension as 05 [Benign or borderline brain tumors]. Code the size of the tumor if specified. Otherwise code CS Tumor Size as 999 for benign CNS tumors.

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.

For tumors diagnosed prior to 2007:

The presence of numerous/multiple polyps is not necessarily adenomatous polyposis coli. Adenomatous polyposis is an extreme condition usually characterized by the presence of hundreds of polyps and should be identified as such either clinically or pathologically.

Look for the term "Familial adenomatous polyposis," FAP or one of its synonyms:

Adenomatosis of the colon and rectum [ACR]

Familial adenomatous colon polyposis

Familial colonic polyposis

Multiple familial polyposis

In the absence of these terms, the following probably indicate a diagnosis of FAP:

Hundreds of adenomatous polyps throughout large intestines, and at times, throughout the digestive system

Development of polyps as early as ten years of age, but more commonly at puberty

History of colectomy

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.

If it is not clear where the tumor originated, use the following criteria to distinguish ovarian primaries from peritoneal primaries.

The primary site is probably ovarian, unless:

--Ovaries have been previously removed

--Ovaries are not involved (negative)

--Ovaries have no area of involvement greater than 5mm.

Descriptions such as "bulky mass," "omental caking" probably indicate an ovarian primary.

Descriptions such as "seeding," "studding," "salting" probably indicate a peritoneal primary.

For cases diagnosed prior to 1/1/2010:Site: C492 [Soft tissue thigh]

Histology: 9680/36 [T-cell rich large B-cell lymphoma]

For cases diagnosed 2010 forward, refer to the Hematopoietic and Lymphoid Neoplasm Case Reportability and Coding Manual and the Hematopoietic Database (Hematopoietic DB) provided by SEER on its website to research your question. If those resources do not adequately address your issue, submit a new question to SINQ.