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Previous Volume 338:1701-1702 June 4, 1998 Number 23 Next

	Since this article has no abstract, we have provided an extract of the first 100 words of the full text and any section headings.

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To the Editor: With respect to the January 22 Case Records,¹ we would like to point out several limitations to the diagnostic value of an assay of adenosine deaminase activity. Some studies have shown that the specificity of an adenosine deaminase assay for the diagnosis of tuberculous pleuritis is 100 percent. However, in a review of the topic, Bañales et al.² found that the specificity ranged from 76 percent to 100 percent. Burgess et al.,³ who reported a specificity of 81 percent, emphasized that elevated adenosine deaminase activity may be associated with a number of other diseases, including malignant conditions . . . [Full Text of this Article]

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