title: Methotrexate-induced pneumonitis: appearance four weeks after discontinuation of treatment.
abstract: A 71-year-old man with a long-standing history of rheumatoid arthritis required methotrexate treatment since 1986, with a total dose of 210 mg. In April 1987, before arthroplastic surgery, methotrexate was discontinued. Four weeks later a syndrome of fever, dry cough, shortness of breath, and diffuse air-space consolidations on the chest radiograph evolved. An antibiotic therapy had no beneficial effect, and a bronchoscopy yielded no pathogens. An open lung biopsy led to the diagnosis of methotrexate-induced pneumonitis. This is the first report of a case where methotrexate-induced pneumonitis developed several weeks after cessation of the treatment. Methotrexate can cause four types of pulmonary adverse reactions: pneumonitis, pulmonary edema, pulmonary fibrosis, and pleuritis. Possible pathogenetic mechanisms, symptoms, treatment, and prognosis are discussed.
authors: Department of Internal Medicine, University Hospital, Basel, Switzerland.
authors: S
authors: S
authors: Elsasser
authors: P
authors: P
authors: Dalquen
authors: M
authors: M
authors: Soler
authors: A P
authors: AP
authors: Perruchoud
mesh_terms: D000368:Aged; D001172:Arthritis, Rheumatoid / Q000188:drug therapy; D006801:Humans; D008297:Male; D008727:Methotrexate / Q000009:adverse effects*; D011658:Pulmonary Fibrosis / Q000139:chemically induced* / Q000473:pathology; D013997:Time Factors
chemical_list: D008727:Methotrexate