What does the diagnosis mean?

My son has chronic issues with pneumonia and bronchitis and the like, he was a NICU baby and is also a regular in the PICU. His most recent hospitalization left us with a doozy. After his 4th abnormal CXR, he was CT scanned. There were 2 significant findings- 1. Uneven aeration of the lungs. 2. Opacity in the LLL. Which is believed to be scarring due to frequent infection. His pulmonologist said she would need the results of his most recent labs to fully interpret the CT. I don't understand why. I know she's looking for an infection, but the labs were normal, no elveated white count,  no viral infections.  He takes nebulizers (pulmicort, xopenex) and takes singulair daily. My question- with a recent bout of hypozia, (he was on O2 for 6 days straight, with sats in the mid80's, do you think BPD? Thanks

[National Jewish]

Chronic infection can be present with a normal white blood cell count.  Perhaps your son