MP/H Rules/Multiple Primaries--Ovary: How many primaries are accessioned and which multiple primary rule applies for a patient diagnosed with a carcinosarcoma of the left ovary and a serous carcinoma of the right ovary? See Discussion.
Primary Site/Reportability: What is the primary site and reportability status of a "pancreatic endocrine neoplasm" that arises in the heterotopic pancreas of the splenic hilum that is stated to be a "well-differentiated endocrine tumor, uncertain behavior per the WHO classification"? See Discussion.
Primary site/Reportability--Breast: Is a "right nipple skin" biopsy that demonstrates squamous cell carcinoma reportable using a primary site of C500? See Discussion.
Multiple primaries--Heme & Lymphoid Neoplasms: How many primaries are to be accessioned when the patient is diagnosed with an acute neoplasm (diffuse large B-cell lymphoma) per a pathology report and is subsequently diagnosed clinically with a chronic neoplasm (chronic lymphocytic leukemia/small lymphocytic lymphoma) less than 21 days later? See Discussion.
Reportability--Appendix: Is a low grade mucinous neoplasm of uncertain malignant potential with an in situ mucinous cystadenoma component reportable? See Discussion.
Surgery of Primary Site--Kidney, renal pelvis: How do you code a laparoscopic renal mass core biopsy followed by cryoablation of the tumor? See Discussion.
Ambiguous Terminology/Histology--Heme & Lymphoid Neoplasms: What is the histology code if the final diagnosis is "non-Hodgkin lymphoma NOS," but after further genetic and immunohistochemistry studies were performed the pathology report diagnosis COMMENT section stated the immunohistochemistry findings were "compatible with follicular lymphoma"? See Discussion
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