Multiple primaries--Heme & Lymphoid Neoplasms: How many primaries are accessioned when a bone marrow biopsy shows myelodysplastic syndrome - refractory anemia with excess blasts type 2 (RAEB-2) and myelofibrosis? See Discussion.
Histology--Heme & Lymphoid Neoplasms: What is the correct histology code for a diagnosis of mature B cell leukemia/lymphoma diagnosed only on a peripheral blood smear?
MP/H Rules/Histology--Thyroid: How is the histology coded for a poorly differentiated thyroid carcinoma with rhabdoid phenotype arising in a papillary carcinoma?
Histology/Primary site--Heme & Lymphoid Neoplasms: How are the histology and primary site coded if the patient has monomorphic B-cell post-transplant lymphoproliferative disorder with features of diffuse large B-cell lymphoma involving the intramuscular chest wall and right frontal lobe of the brain? See Discussion.
MP/H Rules/Primary site: What is the primary site and histology for a focus of papillary thyroid cancinoma, follicular variant, arising in thyroid tissue of mature cystic teratoma of the ovary?
Reportability--Heme & Lymphoid Neoplasms: If hemophagocytic lymphohistiocytosis treated with several rounds of chemotherapy is reportable, what is the primary site?
MP/H Rules/Multiple primaries--Breast: How many primaries are accessioned if a patient has a history of breast cancer in 2006 treated with bilateral mastectomies and in 2011 is found to have invasive carcinoma in "breast tissue, right lumpectomy"? See Discussion.
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.
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