You may find more help too doing a search here and on the web on "lung cancer symptoms" That said there may be a lung cancer community that woud be even better than the one on cancer I provided a link to.
I have never heard any mention a cough as a sign of possible lung cancer, it is not the first thing that would come to my mind relative to a cough, which I in fact have started suffering from and ascribe it to the dry air in the house now that we are having some real cold weather in NJ.
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