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The SEER Manual states that Marriage is self-reported for the instruction in code 2, but it does not indicate if all other marital statuses are self-reported.

Examples: How is Marital Status reported for the following situations?

1. Patient with multiple tumors in the database, for the first tumor marital status is reported as married (code 2), for the subsequent tumor, marital status is reported as single (code 1).

2. Patient self- reports as single, but also has children.

3. Patient states they are in common law marriage, but our state is not a common law marriage state.

Example 1: Physician states patient has an almost certain melanoma. Due to the patient's age, there is no plan to for any treatment or further workup. Almost certain is not listed as a reportable phrase, so typically we would not accession this case.

Example 2: Imaging states a diagnosis of renal cell carcinoma until proven otherwise. No additional workup is available at this facility. This terminology is also not seen on the ambiguous reportable terminology list but we are seeing it more often and wanted confirmation.

Table 6 (Tumors of the Oropharynx, Base of Tongue, Tonsils, Adenoids) in the Head and Neck Equivalent Terms and Definitions lists both squamous cell carcinoma HPV-positive and squamous cell carcinoma HPV-negative as subtypes/variants of squamous cell carcinoma (the NOS histology, 8070). Squamous cell carcinoma HPV-positive and squamous cell carcinoma HPV-negative are also listed in the 2018 ICD-O-3 update table.

Previous clarification from the standard setters regarding the 2018 ICD-O-3 Update table indicated that histology codes 8085 and 8086 (HPV-positive and HPV-negative squamous cell carcinoma, respectively) included p16+ and p16- squamous cell carcinoma, respectively. Presumably, this clarification was made because p16 is a surrogate marker for HPV, and capturing whether a tumor is HPV-related or not has implications for staging for 2018 and later diagnoses. However, this clarification was not added to the 2018 ICD-O-3 Update table via errata, nor do the Head and Neck Equivalent Terms and Definitions or Histology Coding Rules address this.

Is a diagnosis of p16-positive squamous cell carcinoma equivalent to a diagnosis of squamous cell carcinoma HPV-positive (8085)? If so, will this clarification be added to the Head and Neck Solid Tumor Rules?

10/27/2017 partial nephrectomy final path diagnosis: renal oncocytic neoplasm, favor hybrid oncocytic tumor. Comment:

Since high grade squamous intraepithelial lesion (HGSIL) is reportable for the vulva in 2018 (per SINQ 20130185) but VIN II-III is not reportable, we need to clarify this reporting format seen in our area.

Example: Initial CT scan impression is large appendiceal mucocele with a moderate amount of right-sided abdominal ascites. Faint mural enhancement suggesting an underlying appendiceal neoplasm (mucinous adenoma or adenocarcinoma).

Appendectomy follows two days later with final diagnosis of high-grade appendiceal mucinous neoplasm, see comment. Histologic grade: Grade G2 of 4 (based on the CAP protocol) . . . Ascites fluid (ThinPrep(r) and cell block preparations): Mucin, fragments of debris, and macrophages. No diagnostic neoplastic cells are identified . . . Pathologic stage: pT4a, pNX, pM1a (AJCC 8th ed).

Diagnosis Comment states, We feel that there are areas of this tumor where the cytologic atypia is beyond what one would expect in low-grade appendiceal mucinous neoplasm. While mitotic figures are not strikingly increased, there are focal nuclear changes that would support classification of this tumor as high-grade appendiceal mucinous neoplasm.

Approximately two weeks later the patient has an Oncology assessment stating new diagnosis of T4a, NX, M1a, Stage IVA high-grade mucinous adenocarcinoma of the appendix with mucinous ascites. Patient has had an appendectomy but no further surgery so far. However, anecdotally, the best reported case series has been with surgical debulking followed by HIPEC chemotherapy In that instance I have recommended surgery with intraperitoneal chemotherapy.

Is this a reportable malignancy? If so, what is the best histology for the diagnosis?

A patient has a left breast cancer diagnosed in 2011; then has a "recurrence" in her lymph nodes in 2017. In 2018, she has a new left breast mass that is the same histology and behavior as the 2011 cancer. Based on the 2017 "recurrence" in the lymph nodes, this is not a new breast primary, is that correct?

The Histology Coding Instructions give priority to the Final Diagnosis over the CAP protocol. However, when pathology reports are formatted using the CAP protocol, the presence of in situ carcinoma is generally only mentioned in the CAP protocol. Can the presence of in situ tumor mentioned only in the CAP protocol be used to apply rule H7 (Single Tumor: Invasive and In Situ Components Module)? Or are the rules in the Single Tumor: Invasive Only module used?

Example: Final diagnosis is invasive ductal carcinoma. CAP protocol mentions,