Diagnostic utility of CYFRA 21-1 in malignant pleural effusion |
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Authors: | Dejsomritrutai W Senawong S Promkiamon B |
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Affiliation: | Division of Respiratory Disease and Tuberculosis, Department of Medicine, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, Thailand. siwds@mahidol.ac.th |
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Abstract: | OBJECTIVE: The diagnostic utility of the tumour marker CYFRA 21-1 in malignant pleural effusion is not yet clear. This study was designed to evaluate the diagnostic utility of serum and pleural fluid CYFRA 21-1 in malignant pleural effusion. METHODOLOGY: The validity of serum and pleural fluid CYFRA 21-1 was determined in 62 patients with exudative pleural effusion (27 malignant and 35 benign). The diagnosis of malignant pleural effusion was defined by cytological or histological results. RESULTS: A statistically significant difference between the geometric means of CYFRA 21-1 levels in pleural fluid of benign and malignant aetiologies was observed (11.2 vs 63.3 ng/mL, P < 0.0001). In addition, there was a significant difference in the serum levels (0.95 vs 5.55 ng/mL, P < 0.0001). The sensitivity and specificity of pleural fluid CYFRA 21-1 in malignant pleural effusion, at the cut-off value of 55 ng/mL, was 74.1% and 97.1%, respectively. The sensitivity and specificity of serum CYFRA 21-1, at the cut-off value of 2.5 ng/mL, was 81.5% and 97.1%, respectively. Using a combination of serum and pleural fluid CYFRA 21-1 level, the sensitivity increased to 88.9%. CONCLUSION: Serum and pleural fluid CYFRA 21-1 are useful as measures in differentiating malignant from benign pleural effusion. |
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Keywords: | cancer CYFRA 21-1 malignant pleural effusion |
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