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
Multiple primaries/Histology--Heme & Lymphoid Neoplasms: How many primaries are accessioned and what histology codes apply if a patient has a 1998 diagnosis of essential thrombocythemia and a recent clinical diagnosis of secondary myelofibrosis? See Discussion.
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