title: Welder's pneumoconiosis: diagnostic usefulness of high-resolution computed tomography and ferritin determinations in bronchoalveolar lavage fluid.
abstract: OBJECTIVE
  We assessed the usefulness of high-resolution computed tomography (HRCT) and ferritin determinations in bronchoalveolar lavage (BAL) fluid for diagnosis of welder's pneumoconiosis.
  
  
  METHODS
  We investigated 11 patients with welder's pneumoconiosis who were 34 to 67 years old and had been welding for 17 to 45 years. Ten patients were current smokers. We performed chest radiography and HRCT, and measured serum ferritin on all 11 patients. We obtained BAL fluid in 9 cases and transbronchial lung biopsy (TBLB) specimens in 7. Ferritin concentrations in BAL fluid were compared with those in welders without pneumoconiosis and other pneumoconiosis cases.
  
  
  RESULTS
  HRCT revealed small centrilobular nodules in 9 cases, mild fibrotic changes in 3, and emphysematous changes in 3. Serum ferritin concentrations were elevated (>240 ng/ml) in 10 cases. Ferritin concentrations in BAL fluid were higher in welder's pneumoconiosis than in the occupational control group.
  
  
  CONCLUSIONS
  In welder's pneumoconiosis, small centrilobular nodules are frequently seen on HRCT, and ferritin shows elevations in serum and/or BAL fluid. Such ferritin determinations are of value in diagnosis.
authors.affiliation: Department of Respiratory Disease, University of Occupational and Environmental Health, Kitakyushu.
authors.forename: Chiharu
authors.initials: C
authors.lastname: Yoshii
authors.forename: Tsuneo
authors.initials: T
authors.lastname: Matsuyama
authors.forename: Akiko
authors.initials: A
authors.lastname: Takazawa
authors.forename: Toshiro
authors.initials: T
authors.lastname: Ito
authors.forename: Kazuhiro
authors.initials: K
authors.lastname: Yatera
authors.forename: Toshinari
authors.initials: T
authors.lastname: Hayashi
authors.forename: Tomotoshi
authors.initials: T
authors.lastname: Imanaga
authors.forename: Masamitsu
authors.initials: M
authors.lastname: Kido
mesh_terms: D000368:Aged; D001706:Biopsy; D001992:Bronchoalveolar Lavage Fluid / Q000737:chemistry*; D005293:Ferritins / Q000032:analysis*; D006801:Humans; D008168:Lung / Q000473:pathology; D008297:Male; D008875:Middle Aged; D012806:Siderosis / Q000175:diagnosis*; D012907:Smoking; D014057:Tomography, X-Ray Computed / Q000379:methods*; D014896:Welding
chemical_list: D005293:Ferritins