Multiple Primaries/Behavior--Lung: When a patient has an invasive lung primary, how do in situ tumors of the lung affect the determination of multiple primaries? See discussion.
Multiplicity Counter/Date Multiple Tumors--Bladder: How are these fields coded when multiple tumors were present at the time of diagnosis and another tumor diagnosed a year later is determined to be the same primary? See Discussion.
Multiplicity Counter/Type of Multiple Tumors--Breast: How should these fields be coded when path shows a 1.2 cm infiltrating carcinoma with lobular features and several foci of infiltrating lobular carcinoma [7 foci described as multifocal], 1 large focus, and numerous foci of LCIS and CIS with lobular and ductal features? Should we count the foci or separate tumor nodules, ignore them, or code unknown values for these fields? See Discussion.
Reportability--Myelodysplastic Syndrome: How we handle cases of myelodysplastic syndromes identified in 2001 casefinding documents that are determined to have an "unknown diagnosis" date after review of the patient's hospital medical record?
Reportability/Behavior: Is myxoinflammatory fibroblastic sarcoma (MIFS) reportable for 2018? This histology is on the 2018 ICD-O-3 histology update list with a behavior code of /1. See discussion.
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