also known as “Popcorn Lung,” which is a a scarring of the tiny air sacs in the lungs. This results in the thickening of scar tissue and narrowing of the airways, making it difficult to breathe.

Medically reviewed by Isabel Casimiro, MD, PhD Bronchiolitis obliterans, commonly known as "popcorn lung," is a rare lung disease that happens when the smallest airways in your lungs (called ...

"Popcorn lung" is a rare form of irreversible obstructive lung disease that scars the smallest airways in the lung - the bronchioles - and makes it difficult for air to flow. The disease was so ...