Cytotoxic drugs, principally bleomycin, methotrexate and busulfan, have been associated with pulmonary toxicity. Cytotoxic drug-induced lung disease may be difficult to establish with certainty because other causes of pulmonary disease are frequently present. We discuss the clinical, roentgenographic and histologic effects of the administration of bleomycin, methotrexate, busulfan and other cytotoxic agents on the lungs and suggest that these agents may also cause pulmonary malignancies. We note the importance of careful patient monitoring and withdrawal of a demonstrated offending agent.
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