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Lung India Official publication of Indian Chest Society  
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ORIGINAL ARTICLE
Year : 2009  |  Volume : 26  |  Issue : 3  |  Page : 77-80

Alkaline phosphatase: Distinguishing between tuberculous and nontuberculous pleural effusion


1 Department of Biochemistry, People's College of Medical Sciences and Research Centre, By-Pass Road, Bhanpur, Bhopal, MP, India
2 Department of Biochemistry, Government Medical College, Aurangabad - 431 001, Maharashtra, India

Correspondence Address:
Ashish Anantrao Jadhav
Department of Biochemistry, People's College of Medical Sciences and Research Centre, By-Pass Road, Bhanpur, Bhopal - 462 010, MP
India
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Source of Support: None, Conflict of Interest: None


DOI: 10.4103/0970-2113.53230

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Objectives: To evaluate the value of pleural fluid alkaline phosphatase and pleural fluid/serum alkaline phosphatase ratio for the purpose of differentiating tuberculous from nontuberculous pleural effusion. Materials and Methods: A total of 60 indoor patients, admitted to our hospital, having pleural effusion and suffering from varying etiologies, were included in this study. According to the final diagnosis, these 60 patients were divided into two groups: Tuberculous (30) and nontuberculous (30) pleural effusion. Results: The mean pleural alkaline phosphatase and pleural fluid/serum alkaline phosphatase ratio was significantly higher in tuberculous compared to nontuberculous pleural effusion. ( P < 0.0001). In receiver operating characteristic curve analysis, sensitivity and specificity values were 90% and 80% for a cut-off value of 71 IU/L for pleural alkaline phosphatase activity; and were 90% and 86.66% for a cut-off value of 0.51 for pleural fluid/serum alkaline phosphatase ratio. Conclusion: From this study it is concluded that alkaline phosphatase activity remains a useful test in differentiation of tuberculous from nontuberculous pleural effusion.


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