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?
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.
Primary site--Heme & Lymphoid Neoplasms: How is the primary site coded and what rule applies if the patient has involvement of multiple organs and one lymph node chain with diffuse large B-cell lymphoma? See Discussion.
Primary site--Heme & Lymphoid Neoplasms: How is the primary site coded for a diagnosis of multifocal Langerhans cell histiocytosis with involvement of the bone, liver, spleen and retroperitoneum?
Multiple primaries--Heme & Lymphoid Neoplasms: How many primaries are accessioned if a patient is diagnosed in 2004 with extranodal diffuse large B-cell lymphoma (DLBCL) of the stomach followed by a 2011 diagnosis of DLBCL involving abdominal lymph nodes? See Discussion.
Primary site--Heme & Lymphoid Neoplasms: How is the primary site coded for chronic lymphocytic leukemia/small lymphocytic lymphoma when a lymph node biopsy was positive for CLL/SLL but no bone marrow biopsy was performed? See Discussion.
Multiple primaries/Histology--Heme & Lymphoid Neoplasms: How many primaries are accessioned and what histology codes are used for a 2005 diagnosis of nodular histiocytic lymphoma followed by a 2012 diagnosis of B-cell chronic lymphocytic leukemia/small lymphocytic lymphoma? See Discussion.
Reportability: Is positive urine cytology (ex: malignant cells interpreted as carcinoma) by itself reportable? If so, is the case coded to bladder by default or is is coded to C689, urinary system, NOS?
MP/H Rules/Multiple primaries--Kidney, renal pelvis/Bladder: How many primaries are accessioned if the patient was diagnosed with transitional cell carcinoma in situ of the renal pelvis in October 2006, TCC in situ of the bladder in July 2008 and TCC in situ of the ureter in November 2009?. See Discussion.
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