%0 Journal Article %T An oral fluoropyrimidine agent S-1 induced interstitial lung disease: A case report %A Hiromichi Yamane %A Masahide Kinugawa %A Shigeki Umemura %A Yasuhiro Shiote %J World Journal of Clinical Oncology %D 2011 %I Baishideng Publishing Group Co. Limited %R 10.5306/wjco.v2.i7.299 %X A 66-year-old Japanese man with pancreatic cancer received eleven courses of gemcitabine monotherapy. The tumor responded to gemcitabine until metastatic liver tumors progressed. Subsequently, he was treated with S-1, an oral fluoropyrimidine anticancer agent, as salvage chemotherapy. Forty-two days after initiating S-1, he presented with dyspnea and fever. Chest computed tomography showed diffuse interstitial lesions with thickening of the alveolar septa and ground glass opacity. Serum KL-6 level was elevated to 1,230 U/mL and he did not use any other drugs except insulin. Thus, the development of interstitial lung disease (ILD) was considered to be due to S-1. Arterial blood oxygen pressure was 49.6 Torr in spite of oxygen administration (5 L/min). Steroid therapy improved his symptoms and the interstitial shadows on chest radiograph. Although S-1-induced ILD has mostly been reported to be mild, clinicians should be aware that S-1 has the potential to cause fatal ILD. %K Corticosteroid therapy %K Interstitial lung disease %K Pancreatic cancer %K S-1 %U http://www.wjgnet.com/2218-4333/full/v2/i7/299.htm