Hi. Very natural to be concerned about even though you are scheduled for a CT scan, which is going to explain these things may be to a level of diagnosis. Answer to Your Query: There is a shadow suggestive of a mass- tumor at the base of right lung. Pleura is a double covering over the lung allowing it to move effortlessly every time you breath. This is possible without us knowing because of the fluid in this cavity- which is never seen in the normal X-ray. I your case there is more than normal fluid which is detectable and seen in the x-ray along with the thickening ( obviously due to disease) of this pleura. ON the left side there is prominence of the hilar that is near midline , may be due to lymph nodes. Atelectasis mean shrinkage of that particular part of the lung.. Now the more important thing is - X-ray shows only the suggestive information, many times just gives an idea. Hence Ct scan, which is better to delineate the cause is advised. So wait , relax till the CT scan and further reports are done. This may be anything you are thinking of. Awaiting for your feedback.