I've been in the hospital for a couple weeks now over a collapsed lung. They did surgery on it a couple days ago to staple up a hole that was caused by a bleb. They took some pictures of it and there is a yellow lining along the different lobes of my lung and I was just wondering if they were bad. They couldn't tell me more on it so I just wanted to reach out to the rest of the world to see if other people encountered this problem. I have pictures and can send them if you think you know anything.