I would code this site to the breast if I were doing it. The same rule
applies if you were coding a lymphoma of the stomach. You would code it to the
stomach site, not lymph nodes. Of course with the breast site you would
probably
get a histology/site warning, but I would override it. I think if this
histology was found in breast tissue proper and not just connective tissue near
the
breast, than it needs to be coded as such.

Kim


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