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Assign code 8 for Neoadjuvant Therapy--Clinical Response and assign a code 9 for Neoadjuvant Therapy--Treatment Effect when the treatment is still in progress. Revise these codes after the treatment has been completed.

We will update the manual to include these instructions.

The clinical assessment code takes priority over the pathological assessment code in this case because the clinical assessment was worse than the pathologic assessment. Although there was a pathological assessment, the clinical assessment is greater. According to the general coding guidelines for neoadjuvant therapy, code the worst information, which in this case is the clinical assessment.

The 2018 EOD General Instructions for EOD Regional Nodes, instruction #4, addresses neoadjuvant therapy as follows. Neoadjuvant (preoperative) therapy: If the patient receives neoadjuvant (preoperative) systemic therapy (chemotherapy, immunotherapy) or radiation therapy, code the clinical information if that is the most extensive lymph node involvement documented.

A new note is being included for the 2022 updates. Exception: If patient has neoadjuvant therapy, and the clinical assessment is greater than the pathological assessment, the clinical assessment code takes priority.

Chrondrosarcoma, grade 1 (9222/1) is not reportable according to the Reportability section in the 2021 SEER Manual. The histology (9222/1) is listed in ICD-O-3.2 as a synonym for atypical cartilaginous tumor (preferred term).

In general, the tables do not include non-reportable terms and codes. Registrars should refer to their standard setter (to whom they submit data) for reportable neoplasms. Currently, /0 and /1 neoplasms are reportable for central nervous system sites only. ICD-O-3.2 includes all neoplasms but that does not mean they are reportable. If a facility collects non-malignant neoplasms, use the corresponding ICD-O code in 3.2.

Report this case as type A thymoma. We consulted an expert physician and his advice on this specific case is to interpret it as a malignancy and report.

Use text fields to record the details of this case.

Ecchordosis physaliphora is not reportable.

Stratified mucin-producing intraepithelial lesion (SMILE) of the cervix is not reportable. SMILE is a variant of adenocarcinoma in situ and is coded 8140/2. In situ neoplasms of the cervix are not reportable. According to the WHO Classification of tumors, p16 is positive and there is a high Ki-67 proliferation index.

If SMILE is stated to be invasive, it is reportable, as any other invasive cervical malignancy would be reportable.

Assign code 2 for cases where surgery was planned but ultimately cancelled due to progression in the data item Reason For No Surgery of Primary Site. Code 2 description contains examples and is not exhaustive of reasons for no surgery.

We will add the example for consistency in the next version of the SEER manual.

Intramucosal carcinoma of the colon is assigned behavior code of /3. Intramucosal is not the same as in situ in terms of behavior. Behavior and staging are separate concepts, although there is some overlap. Use the instructions for coding behavior to code this field. Do not use stage to determine behavior in this case.

For purposes of Summary Stage, intramucosal carcinoma is a localized lesion; however, for purposes of AJCC staging, assign Tis for the stage.

When the choice is between ovary, fallopian tube, or primary peritoneal, any indication of fallopian tube involvement indicates the primary tumor is a tubal primary. Fallopian tube primary carcinomas can be confirmed by reviewing the fallopian tube sections as described on the pathology report to document the presence of either serous tubal intraepithelial carcinoma (STIC) and/or tubal mucosal invasive serous carcinoma.

If there is no information about the fallopian tubes, refer to the histology and look at the treatment plans for the patient. If all else fails, you may have to assign C579 as a last resort. Use text fields to document the details.

For additional information, see the CAP GYN protocol, Table 1: Criteria for assignment of primary site in tubo-ovarian serous carcinomas.

Assign the neoadjuvant therapy data items as if the patient had neoadjuvant therapy.  Neoadjuvant Therapy data item would be coded either code 1 or 2 depending on whether the chemotherapy was completed or not. In this case, they are a surgical candidate by having the chemotherapy with the plan from the beginning to evaluate the chemotherapy after X cycles to see if surgery can be performed. After the patient is evaluated, update the abstract as needed.