Doctor says mom does not have lung cancer but I'm not so sure?

Her ribs hurt and she lost a lot of weight and has a cough. He said it's pulled muscle or strained muscle and the cough is probably lungs trying to repair after she quit smoking. He did a chest X ray which was clear and her labs were good so was her oxygen saturation. Lungs sounded clear when he listens to... show more Her ribs hurt and she lost a lot of weight and has a cough.

He said it's pulled muscle or strained muscle and the cough is probably lungs trying to repair after she quit smoking.

He did a chest X ray which was clear and her labs were good so was her oxygen saturation. Lungs sounded clear when he listens to them


Could she still have it and he could be wrong. I heard lung cancer don't always show up on x-ray
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