[A CASE OF IDIOPATHIC PULMONARY FIBROSIS WITH SUSPECTED DRUG-INDUCED LUNG INJURY FOLLOWING ACUTE EXACERBATION AFTER NINTEDANIB ADMINISTRATION].

A 74-year-old man was treated with nintedanib for idiopathic pulmonary fibrosis (IPF). Thirty-six days after starting to take nintedanib, he admitted to our hospital due to respiratory failure with ground-glass opacities and mediastinal emphysema on chest CT. Acute exacerbation of IPF was suspected. Because lung injury due to nintedanib was suspected, nintedanib was discontinued. Although he was treated with pulse corticosteroid therapy, interstitial pneumonia and mediastinal emphysema deteriorated. Despite continuing corticosteroid therapy, he died 21 days after admission due to respiratory failure. Subsequently drug lymphocyte stimulation test for nintedanib was found to be positive. We should pay attention to possibility of drug-induced lung injury caused by nintedanib.