 [ Symptoms ] i suffer sleep deprivation through what appears to be electromagnetic sensations [ Disease ] 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