Drug-induced lung disease frequently poses a diagnostic challenge. Knowledge of common
radiological patterns of lung involvement and corresponding histopathologic diagnoses
can facilitate management of individual patients. We outline a framework for understanding
radiological and histologic patterns of drug-induced lung disease. Diffuse forms of
drug-induced lung disease include processes that mimic acute respiratory distress
syndrome (ARDS) and diffuse alveolar hemorrhage. These patterns of drug-induced lung
disease are especially common in patients receiving cytotoxic chemotherapeutic agents.
Chronic forms of drug-induced lung disease include many of the interstitial pneumonias
seen more commonly in patients with idiopathic disease. Bronchiolitis obliterans organizing
pneumonia and eosinophilic pneumonia are nonspecific patterns of drug-induced lung
disease that are radiologically and histologically indistinguishable from their idiopathic
counterparts. In some patients organizing pneumonia and eosinophilic pneumonia mimic
the radiological appearance of neoplastic disease.
Diffuse alveolar damage - nonspecific interstitial pneumonia - usual interstitial
pneumonia - bronchiolitis obliterans organizing pneumonia - eosinophilic pneumonia