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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 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 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 8343/3 for encapsulated variant of papillary thyroid carcinoma. If the pathology report is not available, use the histologic type in addition to other information in the CAP Protocol.

Assign 8380/3. Sertoliform endometrioid carcinoma is a variant of endometrioid carcinoma according to the WHO Classification of Tumors of Female Reproductive Organs, 4th edition. There is no specific ICD-O-3 code for this variant.

Assign 8390/3 for adnexal carcinoma of skin. 8390/3 is reportable, including 8390/3 of skin.

Assign 8441/2. This is based on the WHO classification for female reproductive system tumors.

Assign 8480/3.

There is no mixed ICD-O-3 code for EMPSCG. Both histologies are in the mucinous family: mucinous adenocarcinoma (8480/3) and sweat gland carcinoma (8400/3). Apply Other sites rule H17 and code the numerically higher ICD-O-3 code (8480/3).

Endocrine mucin-producing sweat gland carcinoma (EMPSGC) is a rare low-grade sweat gland carcinoma with a strong predilection to the eyelid region. It is histologically analogous to endocrine ductal carcinoma/solid papillary carcinoma of the breast and is characterized by a multinodular solid cystic mucinous tumor with immunoreactivity to neuroendocrine markers. Only 20 cases of this unusual tumor have been reported.

Assign 8502/3 using Table 6 of 2018 Solid Tumor Rules for Head and Neck. Table 4 notes that there is no ICD-O site code for minor salivary glands. Many minor salivary glands are located in the lips, inner cheek (buccal mucosa), and there are extensive minor salivary glands in the linings of the mouth and throat. Code to the site in which the salivary gland is located.

Mammary analog secretory carcinoma (MASC), also called secretory carcinoma, is a rare, generally low-grade salivary gland carcinoma characterized by morphological resemblance to mammary secretory carcinoma and ETV6-NTRK3 gene fusion. Common sites are of the parotid gland, oral cavity, submandibular gland, and the axilla with rare sites being the face including the lips, trunk, and limbs according to WHO Classification of Head and Neck Tumors, 4th edition and WHO Classification of Skin Tumors, 4th edition.

This histology is usually associated with primary site of breast and you may get an edit that you can override.

Assign 8503/3 for invasive adenocarcinoma arising in a papilloma with high-grade dysplasia, perihilar bile duct primary. Neither ICD-O-3 nor the WHO classification have a code for this specific histology; however, our expert pathologist consultant states 8503/3 is the best available choice based on pages 264 and 273 in the WHO Digestive system classification.