title: [CA19-9-producing idiopathic pulmonary fibrosis with diffuse alveolar damage and a high titer of KL-6--an autopsy case].
abstract: A 73-year-old woman with CA19-9-producing idiopathic interstitial pneumonia was admitted to the hospital when her condition was exacerbated. Chest radiography and computed tomography showed an additional patchy shadow. The serum CA19-9 level remained high during the clinical course, whereas KL-6 increased only at exacerbation. No therapy was effective, and the patient died 5 days later. The lung obtained at autopsy showed hyaline membrane formation, hemorrhage, and squamous metaplasia, suggesting that acute exacerbation had resulted in diffuse alveolar damage. Immunohistochemical staining using either anti-CA19-9 mAb or anti-KL-6 mAb showed the localization of CA19-9 and KL-6 antigen in the dilated bronchiolar epithelial cells. In conclusion, although CA19-9 can be an indicator for the degree of fibrotic and destructive change of lung structure, KL-6 seemed more sensitively to reflect the disease state of the diffuse alveolar damage.
authors.affiliation: Department of Internal Medicine, Nanokaichi Municipal Hospital, 643 Nanokaichi, Tomioka, Gunma 370-2343, Japan.
authors.forename: Y
authors.initials: Y
authors.lastname: Shimizu
authors.forename: Y
authors.initials: Y
authors.lastname: Tanaka
authors.forename: A
authors.initials: A
authors.lastname: Sasaki
authors.forename: T
authors.initials: T
authors.lastname: Nemoto
mesh_terms: D000368:Aged; D000941:Antigens / Q000097:blood*; D000951:Antigens, Neoplasm; D015415:Biomarkers / Q000097:blood; D018395:CA-19-9 Antigen / Q000097:blood*; D017809:Fatal Outcome; D005260:Female; D005355:Fibrosis; D006023:Glycoproteins / Q000097:blood*; D006801:Humans; D007150:Immunohistochemistry; D017563:Lung Diseases, Interstitial / Q000175:diagnosis / Q000473:pathology*; D018396:Mucin-1; D009077:Mucins; D011650:Pulmonary Alveoli / Q000473:pathology*
chemical_list: D000941:Antigens; D000951:Antigens, Neoplasm; D015415:Biomarkers; D018395:CA-19-9 Antigen; D006023:Glycoproteins; C060192:MUC1 protein, human; D018396:Mucin-1; D009077:Mucins