Of course, but...: The answer is NO, if a person is healthy and has no special reason to be suspected of having lung cancer. Many things are possible in life. So, as long as a person has lungs, he CAN have lung cancer, but it is not detectable until the tumor gets bigger. Likewise, he can have brain cancer, liver cancer, etc... But, in order to live a happy, normal life, we say NO CANCER when we don't detect cancer.
Answered 1/2/2020
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