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Year : 2015  |  Volume : 4  |  Issue : 1  |  Page : 6-8

Sialic acid Levels in smokers and nonsmokers with malignant pleural effusion

1 Department of Biochemistry, Pt B D Sharma University of Health Sciences, Rohtak, India
2 Department of Tuberculosis and Respiratory Medicine, Pt B D Sharma University of Health Sciences, Rohtak, India

Correspondence Address:
Simmi Kharb
H No 1447, Sector 1, Urban Estate, Rohtak - 124001, Haryana
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Source of Support: None, Conflict of Interest: None

DOI: 10.4103/2278-0513.149021

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Objective: The present study is designed to measure sialic acid in pleural effusion and in serum samples of patients to differentiate between malignant and nonmalignant diseases. Materials and Methods: The present study was conducted on 30 patients with malignant pleural effusion and 30 patients with nonmalignant pleural effusion. Pleural fluid and blood samples were taken at the time of admission, before starting any treatment. Sialic acid levels were estimated in serum and pleural fluid by Warren's Thiobarbituric Acid (TBA) method. Results: In the present study, serum sialic acid levels were higher in group II as compared to group I. In the present study, pleural fluid (PF) sialic acid levels and PF/serum(S) ratio was higher in malignant pleural effusion (though difference was not statistically significant). Smokers in group II had higher serum sialic acid as compared to group 1 (P < 0.05). The sensitivity and specificity of PF/S sialic acid ratio with cut off value of 0.7 were 76.67% and 20%, respectively, whereas taking the cut off value of 70mg/dl for pleural fluid sialic acid in malignant pleural effusions, the sensitivity was 63.33%, specificity 60%, and positive predictive value 46.34%. Conclusion: These findings indicate that determination of sialic acid levels in pleural fluid has diagnostic value as a cheap, simple, and reliable marker for malignant pleural effusion.

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