Andrea, I have a friend right now who has a similar issue, they found a big tumor in her fathers lung and removed the lung. The tumor looked weird (not LC primary like), so they started fishing, found a spot in the colon, removed it. The biopsy isn't back, but apparently I have heard that often a colon cancer likely spreads to the lung. Interestingly, no lymph involvemment annd they are now going the Chemo/rad route to really attack anything hiding anywhere else.
Also
I am NOT 100% sure, ,but I believe my paternal grandfather had colon primary that had spread to the lung.