What is smoking induced lung disease RBILD?

Respiratory bronchiolitis interstitial lung diseae, Smoking related pneumonia, Idiopathic interstitial pneumonia (IIP) It is a pathological lesion found in cigarette smokers lungs not associated with symptoms. Histologic features: tan-pigmented macrophages, patchy submucosal and peribronchiolar infiltrates (lymphocytes), peribronchiolar fibrosis contiguous to alveolar walls Could be a part of a spectrum of lung disease.