Honeycomb lung:

Chapter: 12
Refers to end stage fibrotic lung, which may be the result of many types of interstitial, inflammatory, or proliferative processes involving the lung such as AIP, UIP, DIP, DAD, pneumocomosis, infections, hypersensitivity pneumonitis, sarcoid, etc. The lungs become solid with alternating areas of fibrosis and restructuring of distal air spaces leading to formation of small cysts.