Epithelial cell adhesion molecule (EpCAM) from pleural fluid cell lysates is a highly accurate diagnostic biomarker of adenocarcinomatous effusions.
Respirology
; 24(8): 799-804, 2019 08.
Article
em En
| MEDLINE
| ID: mdl-30903651
ABSTRACT
BACKGROUND AND OBJECTIVE:
The discovery of highly accurate pleural fluid (PF) biomarkers of malignancy remains elusive. We assessed the operating characteristics of the PF epithelial cell adhesion molecule (EpCAM), claudin 4 (CL4) and human epididymis protein 4 (HE4) as potential markers of epithelial malignancies.METHODS:
The three markers were quantified by immunoassays in the supernatants (s) and cell lysates (cl) of 175 PF samples. The cut-off values with 100% specificity were selected for malignant-benign discrimination. An immunocytochemical staining index score for each marker was also evaluated on PF cell blocks. The resulting best biomarker was further validated in two independent populations of 73 and 48 patients with pleural effusions (PE).RESULTS:
An EpCAM(cl) >98 pg/g total lysate protein yielded 75% sensitivity, 100% specificity, negative likelihood ratio of 0.25 and area under the curve of 0.94 for labelling adenocarcinomatous effusions. Sensitivity reached 88% if EpCAM(cl) was combined with EpCAM immunostaining. One-third or more of the malignant effusions exhibiting a false-negative cytological fluid examination were correctly classified by EpCAM(cl) concentrations. Immunoassays for CL4 and HE4 were diagnostically useless.CONCLUSION:
EpCAM(cl) is a new biomarker of adenocarcinomatous PE with meaningful discriminating properties.Palavras-chave
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Adenocarcinoma
/
Derrame Pleural Maligno
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Molécula de Adesão da Célula Epitelial
Tipo de estudo:
Diagnostic_studies
/
Etiology_studies
/
Prognostic_studies
Limite:
Aged
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Female
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Humans
/
Male
Idioma:
En
Ano de publicação:
2019
Tipo de documento:
Article