 [ Symptoms ] can the contrast in a ct scan cause cancer cells i am a 73 year old woman in good health after a chest xray a 7mm spot was found on my right lung the dr wants me to have a ct scan with contrast i have read quite a bit about the scan and am not at all comfortable with many side effects of the contrast  can anyone provide details in the risks of the dye  thank you [ Disease ] the dye used for contrast is safe very safe people can have a rare allergic reaction to it just like any substance but in most cases there will be no side effects and it will not cause cancer cells