Well not really, because the OP isn't a doctor. Sure, you could go on listing possible symptoms of cancer for days, but that's not really any help here, is it? Initial symptoms, as far as most people are concerned, are things which say "You could have cancer here, go get it checked out." Not headaches and having a bad cough. Getting people worried about having cancer every time they get a cold, based on the minute chance they might have cancer from those symptoms, is hardly something you should be encouraging. But I guess you'll realise that eventually if you want to make a succesful doctor.