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Revised December 2015

ELST is reportable. Code histology to adenocarcinoma (8140/3). Code primary site to inner ear (C301).

Endolymphatic sac tumors are rare non-metastasizing adenocarcinomas that originate in the endolymphatic sac of the inner ear (C301). They are slow growing and widely invade, and in later stages often destroy, the petrous bone. The WHO Classification assigns ICD-O-3 code 8140/3.

For cases diagnosed 1998-2003:

Code the EOD-Extension to 99 [Unknown] for this case until more information is received. The available information does not describe the primary site and there is a complete lack of staging information.

Head and neck cancers spread early and often to nodes. Do not code the EOD-Extension to localized when the information is as limited as it is for this example.

This answer was provided in the context of CSv1 coding guidelines. The response may not be used after your registry database has been converted to CSv2.

Do not code vocal cord fixation when the only information available is "hoarseness." Vocal cord fixation must be documented on endoscopy. Hoarseness is a common presenting symptom of laryngeal malignancy.

For tumors diagnosed prior to 2007:

Yes, ICD-O-3 histology code 8316 is the correct code for the three examples above.

There are two categories of cyst-associated renal cell carcinomas: Renal cell carcinoma originating in a cyst, and Cystic renal cell carcinoma.

For tumors diagnosed 2007 or later, refer to the MP/H rules. If there are still questions about how this type of tumor should be coded, submit a new question to SINQ and include the difficulties you are encountering in applying the MP/H rules.

The Solid Tumor Rules for Lung rule H4 applies. Per Table 3, page 12, third column on adenocarcinoma row, adenocarcinoma, acinar predominant is coded to 8551/3.

This answer was provided in the context of CSv1 coding guidelines. The response may not be used after your registry database has been converted to CSv2.

Yes, the pelvic lymph node dissection is coded as regional lymph node surgery for both primaries and the nodes are counted in collaborative staging for both primaries. The examination of the pelvic lymph nodes is relevant to both the bladder and the prostatic primaries.

High-grade anal squamous intraepithelial neoplasia (ASIN-H) is synonynous with anal intraepithelial neoplasia, grade III (AIN III).

8811/3 is the correct code for myxofibrosarcoma. See Rule J on page 33 in ICD-O-3. Fibromyxosarcoma is equivalent to myxofibrosarcoma.