Well there are lots of causes of mutations… like toxins… from smoking, poisons, radiation, viruses, etc… You can also be predisposed to cancer due to genes passed on to you from your parents…
So there are lots of potential causes… countless in fact… and there are lots of different cell types that make up the lungs and lots of these can become cancerous… so its not possible to give you an exact number… but suffice to say it is A LOT!!!
So when we say lung cancer you’d be right in thinking of it as a group of cancers!
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bullions2000 commented on :
Thank you for taking time to answer my question!