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[Adenosine deaminase in differential diagnosis of peripheral lymph node tuberculosis].

Examining the activity of serum adenosine deaminase in 112 patients with lymphadenopathy of various etiology revealed its increase (at the discriminant level equal or exceeding 20 U/l) in 86% of 50 patients with active tuberculous infection. The specificity of the parameter as a test for tuberculous peripheral lymph nodal lesion is 90.3%, the positive and negative prognostic significances are 83 and 89%, respectively, the diagnostic efficiency is 88.4%.