P/H Rules/Multiple Primaries--Lung/Breast: Can we assume that a current tissue specimen is a recurrence of previous primary if a pathologist states that he has compared the current specimen with the slides from the prior tumor and concludes that the current tumor is "similar" to a previous tumor? See Discussion.
Place of Birth: When there is conflicting information, which record takes precedence in coding this field, the medical record or the death certificate?
Primary Site (Pre-2007)--Prostate/Prostatic Urethra: What code is used to represent primary site for an "adenocarcinoma with spindle cell differentiation" of the prostatic urethra?
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.
Primary site--Brain and CNS: How should primary site be coded for a medulloblastoma described as a "posterior fossa mass" and "centered within the fourth ventricle"? See discussion.
Primary Site--Breast: If a patient has multifocal tumors all in the upper outer quadrant of the breast, is the primary site coded to C-504 because all of the tumors are in UOQ or would the site be coded to C509 to reflect the fact that multiple tumors exist?
Primary Site--Breast: Is there a hierarchy for coding subsite for breast cases when there is conflicting information in the physical exam, mammogram, operative and pathology reports as to the exact location of the primary? See discussion.
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