Both LIP and low grade lung lymphoma may "transform" to a high grade lymphoma UIP, usual interstitial pneumonitis; NSIP, nonspecific interstitial pneumonitis; DIP, desquamative interstitial pneumonitis;
RB-ILD, respiratory bronchiolitis-ILD; AIP, acute interstitial pneumonitis; BOOP, bronchiolitis obliterans organizing pneumonia; LIP, lymphocytic interstitial pneumonitis.