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Report Produced: 11/01/2024 09:20 AM

Report Question ID Question Discussion Answer Year
20021108 Histology (Pre-2007)/Grade, Differentiation: What code is used to represent the histology of "well differentiated low grade lipoma-like liposarcoma (atypical lipoma)"? See discussion. The pathologic microscopic description states, "Well differentiated lipoma-like liposarcoma, sometimes termed atypical lipoma. This tumor will behave in a low grade malignant fashion. Slow growing recurrences can be expected. Metastatic disease is very rare unless the tumor dedifferentiates."

For tumors diagnosed prior to 2007:

Code the Histology field to 8851/3 [Liposarcoma, well differentiated] and the Grade to 1 [Well differentiated]. This histology is reportable to SEER.

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
20021136 Date of Diagnosis/Histology (Pre-2007): How should we code these fields for "atypical fibroxanthoma" of the left cheek diagnosed in October 1999 that is followed by a June 2000 punch biopsy with a microscopic description in the pathology report of "superficial form of malignant fibrous histiocytoma"? See discussion. Should the diagnosis date for the malignant fibrous histiocytoma be October 1999 because it is called "residual/recurrent atypical fibroxanthoma" in the June 2000 final diagnosis of pathology report? In the microscopic description it is called a "malignant fibrous histiocytoma." Per an August 2000 outpatient note, "The patient probably has malignant fibrous histiocytoma. His course has been more aggressive than that seen with an atypical fibroxanthoma."

For tumors diagnosed prior to 2007:

Code the Histology field to 8830/3 [Malignant fibrous histiocytoma]. Code the Date of Diagnosis to October 1999 based on the clinician's statement of "The patient probably has malignant fibrous histiocytoma. His course has been more aggressive than that seen with an atypical fibroxanthoma." Assume that this statement means that the physician re-evaluated the clinical course and decided that the original tumor must have been malignant.

If the original slides are reviewed and the diagnosis is changed to a malignancy or if the clinician states that the first occurrence was obviously malignant, backdate the date of diagnosis to the first occurrence.

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
20020057 Histology (Pre-2007)--Melanoma: What code is used to represent the histology "radial growth phase: melanoma, superficial spreading type; vertical growth phase: epithelioid type"? See discussion. Can the "growth phase" be used to code histology? If so, would the histology be epithelioid cell melanoma (8771/3)?

For tumors diagnosed prior to 2007:

Code the Histology field to 8771/3 [epithelioid cell melanoma]. The "growth phase" information in this case describes the horizontal spread and the "invasive" or vertical growth through the layers of skin.

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
20021062 Histology (Pre-2007)--Breast: What code is used to represent histology for "invasive ductal carcinoma with squamous differentiation"? Is "squamous differentiation" synonymous with "squamous metaplasia"?

For tumors diagnosed prior to 2007:

Code the Histology field to 8570/3 [Adenocarcinoma with squamous metaplasia]. Our pathology consultant agrees that squamous metaplasia is synonymous with squamous differentiation.

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
20021176 Histology (Pre-2007)/Multiple Primaries (Pre-2007)--Breast: What code is used to represent histology for a case with a biopsy specimen that reveals "infiltrating ductal carcinoma with ductal carcinoma in situ, comedo subtype, non-extensive" in one quadrant of the breast and a mastectomy specimen with "invasive pleomorphic lobular carcinoma with lobular carcinoma in situ" in another quadrant of the breast? Paget disease is identified in the nipple section.

For tumors diagnosed prior to 2007:

Code the Histology field to 8522/3 [infiltrating duct and lobular carcinoma]. We are choosing the ductal and lobular combination over the Paget disease and lobular combination because it is more important for analysis purposes.

Be careful in using combination codes to code separate tumors in different locations of the same breast as a single primary. Currently there are only three combination codes for the breast that allow for this situation, 8522 [duct and lobular], 8541 [Paget disease and infiltrating duct] and 8543 [Paget disease and intraductal]. Other histologic type differences that occur as separate tumors in different parts of the same breast are coded as multiple 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
20021054 Histology (Pre-2007)--Breast: What code is used to represent the histology "invasive ductal carcinoma, mucinous type and invasive lobular carcinoma"?

For tumors diagnosed prior to 2007:

Code the Histology field to 8522/3 [infiltrating duct and lobular carcinoma] per rule 1 of the Coding Complex Morphologic Diagnoses, because the tumor is both lobular and ductal.

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
20021069 Histology (Pre-2007)--Breast: What code is used to represent the histology "infiltrating lobular carcinoma, solid and classical subtypes"?

For tumors diagnosed prior to 2007:

Code the Histology field to 8520 [Lobular 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.

 2002
20021127 Histology (Pre-2007)/Behavior Code--Thyroid: What code is used to represent the histology "micropapillary carcinoma" of the thyroid? See discussion. The ICD-O-3 includes "micropapillary intraductal (C50._)" [8507/2], "micropapillary serous (C56.9)" [8460/3] and "micropapillary transitional cell (C67._) [8131/3] but does not seem to include a micropapillary code for a thyroid primary.

For tumors diagnosed prior to 2007:

Code the Histology field to 8507/3 [micropapillary carcinoma]. According to rule H, the topography code listed in the ICD-O is disregarded if the tumor is known to arise in another site. In this case, the site is thyroid [C73.9] so the topography code of breast [C50._] can be disregarded for this histology. Apply the matrix principle to change the Behavior Code from 2 to 3.

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
20010157 Histology (Pre-2007)--Breast: What code is used to represent the histology of "invasive ductal carcinoma and in situ ductal carcinoma, cribriform type"?

For tumors diagnosed prior to 2007:

Code the Histology field to 8500/3 [ductal carcinoma] unless the combination is ductal and lobular.

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.

 2001
20010046 Histology (Pre-2007)/EOD-Lymph Nodes/SEER Summary Stage 2000--Breast: What codes are used to represent these fields for a breast case with a diagnosis of ductal carcinoma in situ and a positive regional lymph node?

For tumors diagnosed prior to 2007:

Code the Histology field to 8500/3 [Infiltrating duct carcinoma, NOS]. Code the EOD-Lymph Nodes field to 6 [Axillary/regional lymph nodes, NOS] and the SEER Summary Stage 2000 field to 3 [Ipsilateral regional lymph nodes(s) involved only].

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.

 2001