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Report Produced: 12/13/2025 08:18 AM

Report Question ID Question Discussion Answer Year
20021126 EOD-Extension--Head & Neck (Tonsil): How should the EOD-Extension field be coded for bilateral tonsil involvement? See discussion.

Tonsillectomy and bilateral radical neck dissections were done. The path diagnosis was left and right tonsils: squamous cell carcinoma, bilateral tonsils with negative inked surgical margins of resection. Physical exam and operative findings did not mention any extension beyond the tonsils.

We originally coded the EOD-Extension field to 30 for a bilateral tonsil primary. The case failed the SEER Edit IF41 (Primary Site/Lat/EOD). According to that edit, if laterality is 4 then the EOD-Extension field must not be 00 through 30.

We recoded the EOD-Extension field to 99 in order to comply with the SEER edit.

For cases diagnosed 1998-2003:

Code EOD extension as 30 [Localized, NOS] and laterality as 4 [Bilateral involvement]. The next update to the SEER edits will allow this combination.

 2002
20021187

Reportability: When a hospital pathologist sends the slides from an original biopsy to two or more outside reviewers and the reviewers differ on whether or not the case is reportable, is the case SEER reportable? Does the decision to treat the patient have any bearing on whether the case would be reportable?

Typically, the final diagnosis of the reviewing pathologist is the one used to determine whether the case is SEER reportable. If two or more reviewing pathologists disagree as to whether the case should be reportable, determine reportability based on the following priority order:

1) If the patient is treated for cancer, the case is reportable.

2) If the patient is not treated for cancer, use the amended diagnosis on the original pathology report if the hospital pathologist used the reviewing pathologists' opinions in establishing his new diagnosis.

3) If there is not an amended diagnosis for the original hospital pathology report, use the clinician's opinion regarding what the diagnosis is to determine whether the case is reportable.

 2002
20021103 Surgery of Primary Site/First Course Treatment--Liver: If disease progression is so rapid that the initial therapy plan is changed before patient receives any therapy, would "no therapy" be the first course? See discussion. Patient was diagnosed with liver cancer on 8/23 and on 9/6 a hepatectomy was recommended. However, patient was hospitalized on 9/19 with ascites. Patient underwent embolization instead of a hepatectomy during that admission.

Code the "embolization" (or hepatic artery embolization, HAE) in Surgery of Primary Site. Assign code 10 [local tumor destruction, NOS].

The embolization is coded as first course of therapy for this case because it seems that this patient was not adequately staged until 9/19 -- there is no indication on this case of the stage of disease in August or early September. Furthermore, no treatment was started before the embolization. Therefore, the ascites is not "progression of disease" in this case -- it is taken into account as part of the initial stage of disease.

This procedure was previously coded as other therapy, experimental. Code as surgery as of July 2005.

 2002
20021046 Behavior Code/EOD-Extension--Bladder: If an in situ lesion of the urinary bladder involves the von Brunn nests, is it still in situ? See discussion.

Von Brunn nests: Compact, rounded aggregates of urothelial (transitional) cells in the lamina propria, with or without connection to the surface epithelium.

Urothelial (transitional cell) carcinoma in situ...may involve von Brunn nests...

Histologic Typing of Urinary Bladder Tumours, Second Edition, WHO, pp 12 & 21

For cases diagnosed 1998-2003:

Code the Behavior Code and the EOD-Extension field according to the pathology report.

If the pathology report states the tumor to be noninvasive or in situ, whether or not von Brunn nests are involved, code behavior as 2 [in situ] and extension as in situ.

If the tumor is described as invasive and involves the von Brunn nests, code the EOD-Extension field to 15 [invasive tumor confined to subepithelial connective tissue] because code 15 includes extension to the lamina propria and von Brunn nests are within the lamina propria.

 2002
20021055 EOD-Extension--Liver: Can we use CT scan descriptions such as "portal vein thrombosis" or "extensive infiltration of the liver" or "diffuse infiltration of the liver" to code extension for liver primaries? See discussion.

1. Would you code portal vein involvement for a CT scan description of "portal vein thrombosis"?

2. Would you code more than one lobe of the liver as involved for CT scan descriptions of "extensive infiltration of the liver" or "diffuse infiltration of the liver"?

For cases diagnosed 1998-2003:

1. No. Thrombosis can be caused by non-cancerous conditions.

2. Yes. Code the EOD-Extension field to 65 [Multiple (satellite) nodules in more than one lobe of the liver] when "extensive infiltration" or "diffuse infiltration" is stated.

 2002
20021152 Primary Site: Can we assume the primary site for "chordoma" is soft tissue if the bone is not stated to be involved?

Default the coding of the Primary Site field for chordomas to the bone where the tumor began in the body if the primary site is not clearly stated to be soft tissue. Bone is often the primary site for chordomas.

Based on advice from pathologist consultants: This is one of those situations where we can be quite comfortable with a default, in this case to bone, not soft tissue. Chordoma is a tumor arising in the nucleus pulposis, presumably from remnants of notochord - thus its exclusive origin is in the sacrococcygeal region, spheno-occipital region, and vertebral bodies, otherwise known collectively as the axial skeleton. Any "chordoma" in soft tissue (with no relationship to axial skeleton) is probably a myxoid chondrosarcoma or parachordoma (extremely rare).

 2002
20021059 Surgery of Primary Site--Soft Tissue: What code is used to represent this field when an excisional biopsy of a soft tissue sarcoma is followed two weeks later with a wide excision (re-excision)? For cases diagnosed 1/1/2003 and after: Code the Surgery of Primary Site field to 26 [partial resection]. According to the CoC, "Excision" in the surgery codes refers to the lesion and "partial resection" refers to the organ. The biopsy is a local excision (code 25). The wide resection is code 26, presuming that more than just the remaining lesion was removed. 2002
20021012

EOD-Extension--Lymphoma: How do you code stage and EOD for an extranodal lymphoma with bilateral involvement of a paired site? See discussion.

For example, we frequently see cases of lymphoma occurring in bilateral orbits, or both lungs. This issue was discussed at a 1991 SEER meeting with the tentative answer being that lymphoma involving both organs of a paired site will be coded as stage I (e.g., both eyes or both lungs), as this would be contiguous disease. However, an extranodal lymphoma involving tissue of both limbs (e.g., soft tissue of both arms) will be coded as stage IV because this represents wide areas of involvement that have no connection.

For cases diagnosed 1998-2003:

Bilateral involvement of an extralymphatic paired organ is coded as involvement of a single extralymphatic organ or site for lymphomas. The EOD extension code would be at least 11 (Stage IE). Staging lymphomas of any site depends on whether one or more lymph node regions and/or extralymphatic organs are involved, and whether sites on one or both sides of the diaphragm are involved.

 2002
20021146 Primary Site--Lymphoma: Is the primary site likely to be extranodal for a lymphoma that presents in an extranodal site and lymph nodes which are regional for that site? Is the primary site also likely to be extranodal if an extranodal site and lymph nodes are excised? See discussion. Example: Work-up included a negative CXR. A CT showed multiple dilated loops of small bowel consistent with obstruction and nodular prominence at the base of bladder. Laparotomy with resection of small bowel and multiple biopsies of enlarged mesentric lymph nodes performed. Final path diagnosis: Lymphoma in a "mesenteric mass" and in "small bowel." There was no mention of lymph nodes in the final diagnosis and the detailed micro described the mesenteric mass as just adipose tissue replaced by lymphoma. However, the gross for that specimen states 4 lymph nodes were found in the fat. The small bowel micro described an ulcerated lesion of the small bowel extending into muscularis.

For cases diagnosed prior to 1/1/2010:Code the Primary Site field to C17.9 [small bowel] for the example. When an extranodal organ and that organ's regional nodes are involved, the extranodal site is most likely the primary, unless there is extension from the regional nodes to the organ. If the primary site cannot be determined for a lymphoma diagnosed in both a nodal and extranodal site, code to C77.9 [lymph nodes NOS].

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.

 2002
20020069 Reportability--Hematopoietic, NOS: Is "evolving" multiple myeloma reportable to SEER?

For cases diagnosed prior to 1/1/2010:No, it is not SEER reportable. The diagnosis of "evolving" multiple myeloma could represent a plasmacytoma, plasma cell dyscrasia or another lymphoproliferative disorder. Some of these histologies are SEER reportable, but some are not. Additional information would be needed to determine reportability. If you are unable to obtain more information, the case is non-reportable.

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.

 2002