Honeycomb lung

Honeycombing or "honeycomb lung" is the radiological appearance seen with widespread fibrosis and is defined by the presence of small cystic spaces with irregularly thickened walls composed of fibrous tissue. Dilated and thickened terminal and respiratory bronchioles produce cystic airspaces, giving honeycomb appearance on chest x-ray. [Source: Wikipedia ]

End-stage interstitial pulmonary fibrosis
End-stage lung disease
May Cause
Cavitary lung lesion in an infant or child
Multiple cavitary lung lesions
Thin-walled lung cavity