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Colocalization of CA19-9 and KL-6 to Epithelial Cells in Dilated Bronchioles in a Patient with Idiopathic Pulmonary Fibrosis Complicated by Diffuse Alveolar Damage

Overview
Journal Respirology
Specialty Pulmonary Medicine
Date 2002 Aug 3
PMID 12153695
Citations 10
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Abstract

A 73-year-old woman with idiopathic pulmonary fibrosis (IPF) had an elevated serum CA19-9 level, but not KL-6. Her condition worsened and she subsequently died and this was associated with a rise in the serum KL-6 level. At autopsy, the lung showed a honeycomb appearance macroscopically and, microscopically, hyaline membrane formation was seen. Immunohistochemical staining revealed partial colocalization of KL-6 and CA19-9 to dilated bronchiolar cells. These features suggest that the mechanisms that cause the synthesis and release of CA19-9 and KL-6 from damaged lung tissue in IPF are likely to differ from those in diffuse alveolar damage. In addition, serum KL-6 levels may reflect the severity of disease more sensitively than CA19-9 levels.

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