title: Unilateral methotrexate-induced pneumonitis.
abstract: To date, all reported cases of methotrexateinduced pneumonitis had bilateral pulmonary parenchymal involvement. The authors describe the development and probable pathogenesis of unilateral methotrexate-induced pneumonitis in a patient with carcinoma of the tonsil that was metastatic to the lung and produced unilateral pulmonary artery obstruction.
mesh_terms: D002294:Carcinoma, Squamous Cell / Q000188:drug therapy / Q000556:secondary*; D005260:Female; D006801:Humans; D008175:Lung Neoplasms / Q000188:drug therapy / Q000556:secondary*; D008727:Methotrexate / Q000009:adverse effects* / Q000627:therapeutic use; D008875:Middle Aged; D011014:Pneumonia / Q000139:chemically induced*; D014067:Tonsillar Neoplasms / Q000188:drug therapy*
chemical_list: D008727:Methotrexate