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Assign 8323/3, clear cell papillary renal cell carcinoma using the 2018 Kidney Solid Tumor Rules, Rule H1, as this is a single histology, a variant of renal cell carcinoma NOS.

Assign 8312/3 to MiT family translocation renal cell carcinoma (RCC) with Xp11 translocation.

The recent WHO 4th Ed Tumors of the Urinary System has proposed a new ICD-O-3 code for MiT family translocation RCC, however the implementation of this new code has not yet been approved by the standard setters (SEER, CoC, CDC, NAACCR). Until it is approved, code histology to renal cell carcinoma (8312/3).

Assign 8253/2 for adenocarcinoma in situ, mucinous. New codes were added in 2018 for mucinous adenocarcinoma in situ for lung cancer only as all cases were not invasive. Pathologist are discouraged from using the term BAC. In-situ lung tumors can now be identified as either mucinous or non-mucinous and the appropriate ICD-O code should be assigned based on diagnosis.

Assign 8230/2 (ductal carcinoma in situ, solid type/intraductal carcinoma, solid type) using Breast Solid Tumor Rules Table 3 as instructed in Rule H2 for in situ tumors. The carcinoma, NST row lists this histology in the subtype/variant column 3.

Coding histology for in situ breast tumor differs from invasive. While the majority of in situ breast primaries will be coded to DCIS 8500/2, there are others that are listed in Table 3 that should be coded according to the specific histology. Some codes have the word subtype or type as part of their histologic term so these can be coded based on the histologic term as listed in the table. We suggest you routinely review the histology tables to see if a term is listed.

Assign 8213/3 to invasive adenocarcinoma arising in a sessile serrated adenoma. The instruction in SINQ 20120089 is still valid. The 2014 ICD-O-3 Update does not change this SINQ answer.

Assign 8201/2 for this case.

MP/H rules are to code histology based on the specimen with the most tumor tissue. That would be the lumpectomy in this case. The histology is DCIS, cribriform type.

Reference: http://seer.cancer.gov/tools/mphrules/mphrules_instructions.pdf

The general rule for grade is to code the highest grade specified within the applicable grading system. For the case information provided, follow instruction #5, nuclear grade: use Coding for Solid Tumors #7: 2-, 3-, or 4- grade system. High nuclear grade (grade code 3 for breast) is higher than nuclear grade 1 (grade code 1).

Reference: http://seer.cancer.gov/tools/grade/

Assign 8140/3 (adenocarcinoma, NOS). WHO has not yet recognized the variant amphicrine prostate carcinoma and have not proposed an ICD-O code for this neoplasm. Document information in a related text field.

Assign 8122/3 for urothelial carcinoma, extensive sarcomatoid dedifferentiation. Sarcomatoid dedifferentiation refers to the histologic type. 8122/3 is also correct for the following diagnoses.

         Urothelial carcinoma, sarcomatoid carcinoma or sarcomatoid variant  8122/3

         Urothelial carcinoma with sarcomatoid features  8122/3

Assign 8083/3, basaloid squamous cell carcinoma (BSCC), in both examples. It is more important to capture the variant than to code 8085 or 8086.

WHO Classification of Head and Neck Tumors, 5th ed., states that BSCC is a distinctive form of SCC, characterized by prominent basaloid morphology, squamous differentiation, and aggressive behavior.  Some primary sites capture p16 status as a Site Specific Data Item; you may record the p16 results when that is the case.

Assign 8077/2 for high-grade squamous intraepithelial lesion, VIN 3 in this case.  The WHO Classification of Female Genital Tumors, 5th edition, states that squamous intraepithelial lesions (SILs) of the vulva are also known as vulvar intraepithelial neoplasia, HPV-associated.  The term squamous cell carcinoma in situ is not recommended.