title: A case of acute exacerbation of idiopathic pulmonary fibrosis after proton beam therapy for non-small cell lung cancer.
abstract: There have been no reports describing acute exacerbations of idiopathic pulmonary fibrosis after particle radiotherapy for non-small cell lung cancer. The present study describes the case of a 76-year-old Japanese man with squamous cell carcinoma of the lung that relapsed in the left upper lobe 1 year after right upper lobectomy. He had been treated with oral prednisolone 20 mg/day every 2 days for idiopathic pulmonary fibrosis, and the relapsed lung cancer was treated by proton beam therapy, which was expected to cause the least adverse effects on the idiopathic pulmonary fibrosis. Fifteen days after the initiation of proton beam therapy, the idiopathic pulmonary fibrosis exacerbated, centered on the left upper lobe, for which intensive steroid therapy was given. About 3 months later, the acute exacerbation of idiopathic pulmonary fibrosis had improved, and the relapsed lung cancer became undetectable. Clinicians should be aware that an acute exacerbation of idiopathic pulmonary fibrosis may occur even in proton beam therapy, although proton beam therapy appears to be an effective treatment option for patients with idiopathic pulmonary fibrosis.
authors: Division of Respiratory Medicine, Department of Internal Medicine, Kobe University Graduate School of Medicine, 7-5-1 Kusunokicho, Chuo-ku, Kobe, Hyogo, Japan. tnagano@med.kobe-u.ac.jp
authors: Tatsuya
authors: T
authors: Nagano
authors: Yoshikazu
authors: Y
authors: Kotani
authors: Osamu
authors: O
authors: Fujii
authors: Yusuke
authors: Y
authors: Demizu
authors: Yasue
authors: Y
authors: Niwa
authors: Yoshiharu
authors: Y
authors: Ohno
authors: Wataru
authors: W
authors: Nishio
authors: Tomoo
authors: T
authors: Itoh
authors: Masao
authors: M
authors: Murakami
authors: Yoshihiro
authors: Y
authors: Nishimura
mesh_terms: D000208:Acute Disease; D000368:Aged; D002289:Carcinoma, Non-Small-Cell Lung / Q000532:radiotherapy*; D002294:Carcinoma, Squamous Cell / Q000532:radiotherapy*; D006801:Humans; D054990:Idiopathic Pulmonary Fibrosis / Q000188:drug therapy / Q000209:etiology*; D008175:Lung Neoplasms / Q000532:radiotherapy*; D008297:Male; D011379:Prognosis; D061766:Proton Therapy / Q000009:adverse effects*