I know no-one can give me definitive answers on this, but just hoping for a few personal experiences. My lovely FIL has had a head cold that's been hanging around for months. He's also had a nasty cough. He had a chest x-ray which has showed a small shadow on it, and so has been referred for an urgent CT scan. He's a long term smoker which doesn't help. We are trying not to worry, but it's hard not too think worst case scenario.