Both gefitinib and erlotinib induced drug-related interstitial lung disease in a patient with pulmonary adenocarcinoma.

Treatment for non-small-cell lung cancer with gefitinib and erlotinib is efficacious. However, while many studies have reported on gefitinib-related interstitial lung disease (ILD), less published data are available regarding erlotinib-induced ILD. Here, we report a case of pulmonary adenocarcinoma who developed ILD due to gefitinib initially and erlotinib thereafter. The two episodes of ILD were treated successfully with the discontinuation of the tyrosine kinase inhibitors and high-dose intravenous corticosteroids.