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The diagnostic usefulness of tumour markers CEA and CA-125 in pleural effusion

Sthaneshwar, Pavai, and Yap, Sook Fan, and Jayaram, Gita, (2002) The diagnostic usefulness of tumour markers CEA and CA-125 in pleural effusion. CEA and CA-125 in Pleural Effusion, 24 (1). pp. 53-58.

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Official URL: http://www.mjpath.org.my/past_issue/MJP2002.1/The%20diagnostic%20usefulness%20of%20tumour%20markers%20CEA%20and%20CA-125%20in%20pleural%20effusion.pdf

Affiliations

University of Malaya. Faculty of Medicine. Dept. of Pathology

Abstract

Pleural effusion is a common diagnostic problem. The analysis of serum and pleural fluid for tumour markers is widely used as a diagnostic aid in clinical practice. The aim of the present study was to determine the usefulness of simultaneous quantification of carcinoembryonic antigen (CEA) and carbohydrate antigen (CA-125) in distinction of malignant from benign effusion. Data from a total of 78 patients including 53 patients with benign and 25 patients with malignant effusion was evaluated. The cut-off values for differentiating benign from malignant effusions were determined using results obtained from patients with known benign effusions (mean + 2 SD, 95% confidence interval). The cut-off for CEA and CA-125 were S.lng/ml and 1707 IU/ml respectively. CEA assay in pleural fluid had an acceptable sensitivity and good specificity of 64% and 98% respectively. CA- 125 had a sensitivity of 36% and specificity of 94%. The combination of the two tumour markers gave a sensitivity of 72% and specificity of 92.4%. We suggest a good clinical strategy may be to begin with CEA measurement (assay specificity 98%); if CEA is below the cut-off value (negative), CA-125 could then be measured to improve the sensitivity of detection of malignant effusions. However, measurement of these tumour markers is not cost effective from the point of view that it does not give information on the type of malignancy present. The latter has to be determined either by histological or cytological study.

Item Type:Journal
Keywords:Pleural effusion, tumour marker, carcinoembryonic antigen(CEA), carbohydrate antigen(CA- 125)
Subjects:R Medicine
ID Code:1824

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