I am really sorry for you. I was also diagnosed with mac, I just found out and I also got a diagnosis with the bronchoscopy of Klebsiella pneumonia. They put me on antibiotics for the pneumonia, but I just found out tonight about the mac. I am really scared! I also found out during all of this with the routine EDG that I have a aggressive form of cancer in my intestine, and I have to have surgery on that. It's scheduled for March 4th and I'm hoping they don't cancel the surgery because of the mac. I'm not really having any symptoms. I have been on antibiotics because of the pneumonia, but in the last couple days I have had a little bit of feeling like I can't take a good deep breath sometimes, it's not all the time though. I'm just so worried about everything. And scared. I had a CT done on Friday and even though the results aren't back from that yet, the doctor put in the notes after he talked to me tonight that the preliminary CT scan results were showing a cavity in my lung. I don't think I've ever been so freaked out. I'm 52, female, and haven't smoked in 3 years... I'm not sure how long I've had this.