had chest ct scan primary care provider thinks it is fluid or an infection can it be cancer?
can not suggest cancer this can happen if you sleep on your left side most of the time with a relaxed life style ( no exercise ) you should not be worried as this lobe could be unused by you for some time now which can cause a collection of dry sputum with some germs if your still worried repeat the ct scan within 3 month see if size changes good luck