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Do not report the case to SEER if it does not satisfy the criteria for reportability. According to the current reportability criteria, malignant GIST (8936/3) is reportable to SEER. GIST coded to 8936/0 or 8936/1 is not reportable. If your pathologist will not indicate "malignant" or "benign," code 8936/1 applies according to ICD-O-3 and, therefore, these are not reportable to SEER.

For cases diagnosed prior to 1/1/2010:The 2008 diagnosis is not a new primary according to the Definitions of Single and Subsequent Primaries for Hematologic Malignancies (the tri-fold heme table) using the pathology report diagnosis from the facility where the procedure was performed (Hospital A). Since Hospital A disagreed with the slide review and did not amend their diagnosis based on the slide review, do not use the slide review diagnosis in this case.

For cases diagnosed 1/1/10 and later, refer to the Hematopoietic and Lymphoid Neoplasm Case Reportability and Coding Manual and the Hematopoietic Database (Hematopoietic DB) provided by SEER on its website to research your question. If those resources do not adequately address your issue, submit a new question to SINQ.

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.In the case of ovarian cancer, the term carcinomatosis may refer to peritoneal implants, especially when the implants are numerous. It does not refer to distant metastases in this context.

This issue has been forwarded to the CS version 2 committee.

For cases diagnosed 2007 or later:

Rule M17 under Other Sites applies. These are separate primaries based on their ICD-O-3 histology codes. Follicular carcinoma is coded 8330. Papillary carcinoma, follicular variant is coded 8340. The histology codes are different at the third number. Rule M6 does not apply because these diagnoses are more than 60 days apart.

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.No. Peripheral blood is not the same as bone marrow involvement which is what would be required for stage IV.

Lymphomas can arise in lymph nodes which are connected by lymphatic vessels. Both lymphatic vessels and blood vessels travel through lymph nodes and malignant cells can travel between the vessels. Cells in peripheral blood do not prove Stage IV.

For cases diagnosed 2007 or later:

Use the 2007 MP/H rules for urinary sites to assess diagnoses made in 2007-2014. Use the multiple tumors module to compare a diagnosis in 2007-2014 to an earlier diagnosis.

For the example above, start by comparing the left renal pelvis diagnosis in 8/07 to the earlier left ureter primary diagnosed 5/05. Start with rule M3. Stop at rule M8. The 8/07 renal pelvis diagnosis is not a new primary. Next, compare the 3/08 bladder tumor to the earlier left ureter primary diagnosed 5/05. Start with rule M3. Stop at rule M5. The 3/08 bladder tumor is a new primary because it is an invasive diagnosis following an in situ diagnosis. Use only the more recent of the two earlier urinary diagnoses for comparison. Do not compare the 2007 and later diagnoses to the 11/89 in situ bladder primary in this case.