title: [Studies of serum markers in patients with interstitial pneumonia/pulmonary fibrosis complicated with collagen diseases: clinical evaluation of CYFRA21-1].
abstract: The serum concentration of several markers in patients with collagen disease was studied to evaluate the useful indices for the diagnosis of interstitial pneumonia/pulmonary fibroses (pneumonitis). Procollagen N-terminal type III peptides, type IV collagen and monoamine oxidase were measured as the fibrosing markers. Squamous cell related antigen (SCC) and soluble cytokeratin 19 fragments (CYFRA21-1) were measured as the tumor markers. Hyaluronic acid, ESR and CRP were measured as the inflammation markers. The 119 patients with collagen disease (71 patients with RA, 16 with SSc, 9 with SLE, 8 with PM/DM, 6 with MCTI) and 9 with other collagen diseases) who have been followed in our hospital were studied. Of 119 patients, 23 patients (RA14, SSc7, PM/DM2) were complicated with pneumonitis. The results were as follows. 1. All the serum markers except CYFRA21-1 had no significantly difference between with and without pneumonitis. The serum CYFRA21-1 level in the pneumonitis group was higher than that of the non pneumonitis group (1.38 vs 0.66 ng/ml, P < 0.001). 2. The cut-off value was set at 2.0 ng/ml, corresponding to 26.1% sensitivity and 97.9% specificity for pneumonitis complicated with collagen disease. 3. The CYFRA21-1 level in early stage of pneumonitis group (from onset to measurement < 1 year) was significantly higher than that of late stage group (from onset to measurement > 1 year). And there are 75.0% sensitivity in early stage of pneumonitis group. 4. Case study was suggested that CYFRA21-1 had a potential as a diagnostic and monitoring marker for pneumonitis.
authors.affiliation: Department of Internal Medicine, Kawasaki Municipal Hospital.
authors.forename: A
authors.initials: A
authors.lastname: Suzuki
authors.forename: T
authors.initials: T
authors.lastname: Masuda
authors.forename: N
authors.initials: N
authors.lastname: Koito
authors.forename: T
authors.initials: T
authors.lastname: Suzuki
authors.forename: S
authors.initials: S
authors.lastname: Mita
authors.forename: Y
authors.initials: Y
authors.lastname: Matsuoka
authors.forename: S
authors.initials: S
authors.lastname: Irimajiri
mesh_terms: D000328:Adult; D000368:Aged; D000951:Antigens, Neoplasm / Q000097:blood*; D014408:Biomarkers, Tumor / Q000097:blood*; D003095:Collagen Diseases / Q000150:complications*; D005260:Female; D006801:Humans; D053539:Keratin-19; D007633:Keratins; D017563:Lung Diseases, Interstitial / Q000175:diagnosis* / Q000209:etiology; D008297:Male; D008875:Middle Aged; D011658:Pulmonary Fibrosis / Q000175:diagnosis* / Q000209:etiology; D012680:Sensitivity and Specificity
chemical_list: D000951:Antigens, Neoplasm; D014408:Biomarkers, Tumor; D053539:Keratin-19; C102012:antigen CYFRA21.1; D007633:Keratins