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Partial nephrectomy showed carcinoma, histologic type: succinate dehydrogenase-deficient renal cell carcinoma. This is not a term in the ICD-O, and is not a histology covered in the Kidney MPH rules. However, a recent web search indicates this is a specific type of RCC that was added to the 2016 WHO classification of RCC (per abstract: https://www.ncbi.nlm.nih.gov/pubmed/27179267) and makes up 0.05-0.2% of RCC cases (https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4229399/).

Since acellular dermal matrix/AlloDerm comes from human tissue donors with cells removed and sterilized to promote regenesis and decrease rejection, is Alloderm coded as "Tissue' as it also "provides an additional layer of tissue between the skin and the implant?

Patient had radical resection of pelvic giant cell tumor of bone in August 2012. Final diagnosis clarified that no features to suggest a frankly malignant giant cell tumor were identified.

July 2013 left upper lobe nodules were removed and found to be consistent with multifocal metastatic lung involvement with a previous pelvic giant cell tumor of bone. However, the pathology report comment specifies there are no histological high-grade features to suggest a malignancy:

While SINQ 20091087 may apply, these metastases clearly arrived in the lung by hematogenous spread. The previous SINQ note refers to a case where the implants/metastases can seed the surrounding pelvic and abdominal structures by rupture of the tumor or intraoperative tumor spillage. That type of spread is not quite the same as the current case showing tumor cells leaving the primary tumor/site and travelling through the blood to implant in the lungs.

Sarcomotoid (8318) is listed as a specific renal cell subtype in the MP/H manual, but it is not listed as a renal cell subtype in the most recent WHO blue book for Urinary Organs. We are wondering if sarcomatoid features, as listed in the CAP protocol format in the following example, should be ignored when coding histology?

Left kidney, radical nephrectomy:

Clear cell renal cell carcinoma, with the following features:

Tumor size: 8.5 X 6 cm.

Tumor focality: Unifocal.

Macroscopic extent of tumor: Tumor limited to kidney.

Sarcomatoid features: Present (<20% of tumor shows sarcomatoid features).

Histologic grade: G4.

Microscopic tumor extension: Tumor limited to kidney.

Margins: All margins negative for invasive carcinoma.

Lymph-vascular invasion: Not identified.

Patient was diagnosed with DCIS of the left breast in June 2014. The patient had a simple mastectomy with 2 axillary lymph nodes removed. The final diagnosis was intermediate to high grade ductal carcinoma in situ, predominantly micropapillary type, forming a 1.4 cm mass. No invasive carcinoma identified. Margins negative. In April 2017, the patient was found to have parietoccipital bone lesions, which were resected. The resulting diagnosis was metastatic carcinoma, morphologically consistent with breast primary " See Comment: The previous breast lesion is not available for review at the time of signout. However, the tumor is morphologically compatible with a breast primary.

SINQ 20110111 would not make this is new primary. However, it seems that rule M8 might apply. An invasive tumor following an in situ tumor more than 60 days after diagnosis is a multiple primary. See Note 2: Abstract as multiple primaries even if the medical record/physician states it is recurrence or progression of disease.

Pathology report: Left lower lobe lung, Tumor Size: Greatest dimension: 3.0 cm Additional dimensions: 2.5 x 2.0 cm; Tumor Focality: Unifocal; Histologic Type: Invasive adenocarcinoma Solid predominant with mucin production; Histologic Grade: G3: Poorly differentiated. Is the correct histology for this case 8230/3 (rule H5) or 8255/3 (rule H6)?

Bronchial washings were negative. Four lymph nodes were biopsied and found to have metastatic poorly differentiated neuroendocrine carcinoma. The treating oncologist calls it small cell carcinoma, extensive stage, and treats patient with carboplatin and VP-16 (etoposide) The MP/H rule says to take path/cyto from a metastatic site if no pathology/cytology available from the primary site. Is the physician's statement and treatment taken into consideration here?

Patient had a biopsy in April 2014; pathology was reported as non-small cell carcinoma with neuroendocrine phenotype, possible large cell neuroendocrine carcinoma. The patient had five cycles of cisplatin/etoposide with no response. In May 2015, a re-biopsy at a referral institution reports poorly differentiated small cell carcinoma and states "feels that this could have been the histology all along and why patient has failed multi lines of chemo."

Surgery text indicates TAH-BSO with bilateral pelvic and paraaortic lymph node dissection. The pathology report indicates the specimen includes: Uterine corpus, cervix, bilateral ovaries and fallopian tubes, bilateral parametria. The Gross Description also indicates: Representative sections submitted in 16 cassettes as follows: A1: Anterior cervix A2: Posterior cervix A3: Full thickness anterior lower uterine segment A4: Full thickness posterior lower uterine segment A5: Tumor A6-A7: Full thickness anterior endomyometrium to include tumor A8-A10: Full thickness posterior endomyometrium with tumor A11: Representative sections of right fallopian tube and fimbria A12: Representative sections of right ovary A13: Representative sections of left fallopian tube and fimbria A14: Representative sections of left ovary A15: Right parametrial tissue A16: Left parametrial tissue A17-23: Remainder of cervix.