Primary site--Colon: How do you determine the correct subsite when there is conflicting information in different reports? Are there priority rules for coding subsite for sites other than Head and Neck? See Discussion.
Primary site--CLL/SLL: How is the primary site coded and what rule applies when no bone marrow biopsy is performed on a patient diagnosed with chronic lymphocytic leukemia/small lymphocytic lymphoma (CLL/SLL) which was based on the results of an axillary biopsy, positive peripheral blood and a CT scan showing multiple lymph nodes involved above and below the diaphragm? See Discussion
Primary Site--Breast: What subsite is to be coded for a case of invasive Paget disease of the nipple with an infiltrating ductal carcinoma of the lower inner quadrant?
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.
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--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.
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