After a recent chest x-ray my doctor casually mentioned that I have shadows on the LOWER part of my lungs probably caused by heavy manual work when I was younger. I replied that I have never done regular manual work,he immediately changed the subject to the reason for the x-ray which was to determine the reason for lots of pain under the rib cage.
I forgot to ask further details about the shadows so i wonder if anyone has any ideas what can cause them,