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This patient was diagnosed in 2016 with renal cell clear cell and was coded to that. In 2018, the patient's liver lesion was resected and pathology revealed epithelioid angiomyolipoma perivascular epithelioid cell tumor (PEComa) (8714/3), a new term as of 2018. This was compared to the kidney slides and it was determined to be metastatic PEComa from the kidney. The physician's note states: The patient had a nephrectomy for a kidney tumor in 2016, excision of cutaneous melanomas, and resection of liver mass in 2018. These three cases were sent in consultation. The diagnosis of cutaneous melanoma was confirmed by a dermatopathologist of our department, (a separate report had been already issued). The kidney tumor is poorly differentiated composed of sheets of discohesive cells with markedly pleomorphic cells with frequent giant and bizarre cells. Most of the cells have abundant eosinophilic to clear cytoplasm. The nuclei are enlarged and pleomorphic. Multinucleated cells are numerous. Some cells have markedly enlarged nucleoli. Multifocal tumor necrosis is noted. Extensive lymphovascular invasion is observed. There are foci at the periphery of the tumor consisting of a proliferation of spindle cells with entrapped adipocytes consistent with minor element of unusual angiomyolipoma (see block A18). The liver tumor has histologic features that are similar to the poorly differentiated component of the kidney tumor.

5/15/17 Duodenal bulb, biopsy: Fragments of duodenal mucosa with well differentiated neuroendocrine tumor (carcinoid), extending to the edge of specimen and peptic duodenitis in the submitted tissue. No significant intraepithelial lymphocytosis.

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.

This will be a tough one for registrars to recognize as non-reportable since the terminology contains sarcoma, so we just want to double check.

The hospital registrar reports that the case was identified at the hospital because of the referral for chemotherapy for the metastatic GIST. The records from the out-of-state hospital mentioned a history of a small bowel resection in 2003 for a borderline tumor. The registrar went back through the hospital's old records and found the surgery was done for GIST of low malignant potential at her facility. The question is whether to report the case or not, and if reported, is 2003 the diagnosis date.

The rules say to change the behavior and backdate the diagnosiswhen a tumor is presumed benign and islater diagnosed as malignant. Another problem for this case is that the out-of-state hospital did not review the slides from the 2003 surgery.

Is Rule H8 a duplicate of Rule H7? Rule H7 instructs one to use Table 2 when there are multiple histologies and the combination is listed in Table 2 (or a combination code was received from Ask a SEER Registrar). Rule H8 states to code adenocarcinoma with mixed subtypes (8255) when there are multiple adenocarcinoma subtypes OR any combination of histologies which are not listed in Table 2. However, both conditions for Rule H8 are already included in Table 2 (the last row). How would one ever move past Rule H7 if all the conditions for both Rules H7 and H8 are covered first under Rule H7?

Example: A resection pathology report proves invasive adenocarcinoma, acinar, solid and papillary types. Rule H7 seems to be the first H Rule that applies as there are multiple histologies (identified using a reportable term: type) AND the combination is listed in Table 2. The last row of Table 2 instructs one to code Adenocarcinoma with mixed subtypes (8255) when there are at least two of the subtypes/variants of adenocarcinoma listed in Column 1 (Required Terms). In this case, there were three subtypes/variants that are listed in Column 1 (acinar, solid and papillary). However, Rule H8 also instructs one to, Which rule applies here, Rule H7 or Rule H8?

Spindled cell lesion of smooth muscle origin (desmin and SMA are positive, CD34, S100, pancytokeratin, Pax8, MDM2 and CDK4 are negative). Many of the cells have hyperchromatic, bizarre-shaped nuclei. Mitotic activity is inconspicuous. There are no areas of necrosis. The overall findings in this biopsy is best classified as a "STUMP"; however, a leiomyosarcoma cannot be excluded.

Pathology--Right breast, lumpectomy with needle localization: Encapsulated papillary carcinoma of the breast. A separate focus of ductal carcinoma in situ is present. Sentinel lymph node, right breast, biopsy: One lymph node, negative for malignancy. No metastatic carcinoma is seen on slides stained with immunostain for cytokeratin (AE1/AE3). Specimen laterality: Right. Tumor size: 1.2 cm. Histologic type: Encapsulated papillary carcinoma. Nuclear grade: Grade 1 (low). Mitotic rate: Score 1. Ductal carcinoma in situ (DCIS): DCIS is present. Estimated size (extent) of DCIS: 3 mm. Architectural patterns: Cribriform and papillary. Nuclear grade: grade 1 (low). Necrosis: Not identified. Margins: Margins uninvolved by encapsulated papillary carcinoma. Distance from closest margin: 8 mm, superior Margins uninvolved by DCIS. Distance from closest margin: 11 mm, superior Lymph nodes: Total number of lymph nodes examined (sentinel and nonsentinel): 1. Number of sentinel lymph nodes examined: 1. Number of lymph nodes with tumor cells: 0. Pathologic staging: Primary tumor: See comment. Regional lymph nodes: pN0(i-). Comment: In the WHO Classification of Tumours of the Breast (2012), it is stated that "there is no universal agreement on how to stage encapsulated papillary carcinomas. In the absence of conventional invasive carcinoma, the consensus of the WHO Working Group was that such lesions should be staged and managed as Tis disease."