Sorry for your troubles. There is a concept of " field cancerization" due to exposure to carcinogens in the aerodigestive tract, adjacent to tumor tissue, and can explain multiple tumors, as well as multiple primaries, synchrounous, monochronous distant tumors, and recurrences due to this exposure, and change in tissue,
Last edited by ChristineB; 03-24-2013 10:57 AM.