Pathergy test with a 23G needle with and without self-saliva in patients with Behçet's disease, recurrent aphthous stomatitis and control group compared to the 20G test.

[ 22 ] study showed a weak reaction (mild erythema) with neat saliva PT in 60% (3/5) of the RAS group We showed high diagnostic accuracy for 20G PT and PT with self-saliva in discriminating patients with active BD from the control group, and additional high diagnostic accuracy of PT with self-saliva for discriminating the patients with BD from non-BD, and nearly significant accuracy for discrimination between the patients with active BD and RAS.

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