Multiple Primaries (Pre-2007): Whenever two hollow organs are diagnosed simultaneously with the same histology, one being invasive and the other in situ, can one assume that mucosal spread has occurred and that this situation represents one primary? In the absence of a physician statement, how do you determine mucosal spread from one organ to another?
Histology (Pre-2007): Can the histology code 8582/3, "thymoma, mixed type, malignant" only be used when you have a thymoma with both type A and type B features? See discussion.
Terminology/EOD-Size of Primary Tumor--Lung: Can the term "opacity" be used to code the size of the primary lung tumor when it is given a size in an imaging study but the "opacity" is not referred to as being suspicious for cancer? See discussion.
Multiple Primaries/Histology (Pre-2007)--Colon: Would one primary be reported when adenocarcinoma arising in a polyp NOS [8210/3] and adenocarcinoma arising in a tubulovillous adenoma [8263/3] were simultaneously diagnosed in the sigmoid colon (first 3-digits of the histology are different)?
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