Multiple primaries/Histology--Heme & Lymphoid Neoplasms: Is there a timing rule used to recode histology should a more specific diagnosis of refractory anemia with excess blasts (RAEB) be confirmed after an initial diagnosis of myelodysplastic syndrome (MDS)? How many primaries are abstracted if RAEB subsequently evolves toward an acute myeloid leukemia? See Discussion.
Reportability--Heme & Lymphoid Neoplasms: Should a 2011 diagnosis of Langerhans cell histiocytosis be accessioned as a reportable case if the patient had a disease free interval between the 2011 diagnosis and when the patient was initially diagnosed with Langerhans cell histiocytosis prior to 2010? See Discussion.
Histology--Heme & Lymphoid Neoplasms: How is histology coded if the pathology report final diagnosis is "plasma cell dyscrasia, consistent with multiple myeloma" when no further work-up is performed because the patient either refuses additional testing or dies?
Diagnostic confirmation--Heme & Lymphoid Neoplasms: How does one determine and code a clinical diagnosis for the diagnostic confirmation in patient diagnosed with essential thrombocythemia? See Discussion.
Reportability: Is a low-grade neuroendocrine neoplasm with gastrin expression found in a periportal lymph node reportable if the clinical impression is compatible with a gastrinoma? See Discussion.
MP/H Rules/Histology--Breast: How is histology coded if a lumpectomy reveals multifocal ductal carcinoma in situ spanning an area of 0.9-1.2 cm with close margins and a subsequent mastectomy reveals only a single focus of lobular carcinoma in situ measuring 0.2 cm in the UOQ, remote from all surgical margins? See Discussion.
Surgery of Primary Site/Scope Regional LN Surgery--Breast: How are these fields coded for breast cases diagnosed 2011 and later when the patient has a simple mastectomy with removal of seven sentinel lymph nodes? See Discussion.
MP/H Rules/Multiple primaries--Breast: How many primaries are to be accessioned when a lumpectomy shows a single 6 mm "infiltrating mammary adenocarcinoma, histologic type: ductal (tubular)" tumor, and "peritumoral microscopic foci of solid type ductal carcinoma in situ"? See Discussion.
Multiple primaries--Heme & Lymphoid Neoplasms: How are the terms "chronic" and "acute" used to help determine the number of primaries to be abstracted and what rule applies when a diagnosis of diffuse large B-cell lymphoma is followed two years later by a diagnosis of follicular lymphoma, grade 3A of 3? See Discussion.
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