MP/H Rules/Multiple primaries--Prostate: Does adenosquamous carcinoma found in the prostate represent a second primary in a patient previously diagnosed with adenocarcinoma of the prostate? See Discussion.
Type of Multiple Tumors/Multiplicity Counter--Breast. Are the data items "Type of Multiple Tumors Reported as One Primary" and "Multiplicity Counter" related? How should they be coded for breast cases in which there are multiple measured invasive tumors, plus DCIS which is not measured nor stated whether it is separate from the invasive tumors? See Discussion.
Reportability: Are there criteria other than a pathologist or clinician's statement that a registrar can use to determine reportability of gastrointestinal stromal tumors (GIST)? See Discussion.
Date of diagnosis--Breast: How is the date of diagnosis coded when a mammogram describes only "suspicious calcifications" with a BIRADS category of 4 assigned and the suspicious calcifications are subsequently proven to be malignant on biopsy? See Discussion.
Reportability: Should a benign gangliocytic paraganglioma [8683/0] be a reportable (malignant) tumor based on the presence of lymph node metastases? See Discussion.
MP/H Rules/Multiple primaries--Ovary: How many primaries are to be abstracted when a patient is diagnosed with serous cystadenocarcinoma [8441] of the right ovary and clear cell adenocarcinoma [8310] of the left ovary? See Discussion.
MP/H Rules/Multiple primaries--Bladder: Is a new primary accessioned for a 2009 diagnosis of transitional cell carcinoma of the bladder when the patient has a history of invasive bladder cancer NOS diagnosed? See Discussion.
Primary site--Bladder/Unknown & ill-defined sites: Should the coding of primary site be based on a molecular study when it is not verified by a clinical correlation? See Discussion.
MP/H Rules/Histology--Melanoma: Regarding SINQ #20081044, when would you apply Rule H6 rather than Rule H5 for a cutaneous malignant melanoma given that you normally always have a specific cell type mentioned?
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