Abstract
The purpose of the present investigation was to demonstrate in vitro cellular hypersensitivity to oral lichen planus lesions. Twenty oral lichen planus patients and 20 control persons matched by and sex were examined by the leukocyte migration agarose technique with tissue extracts from oral lichen planus lesions, normal oral mucosa and normal human kidney, the two latter extracts serving as control antigens. The female lichen planus patients showed statistically significant (P=0.004) migration inhibition with extracts from oral lichen planus lesions, which supports the hypothesis of cellular hypersensitivity to oral lichen planus lesions. However, the male lichen planus patients did not show any significant reaction. No significant reaction was found with the control antigens. The findings do not exclude the hypothesis of cellular hypersensitivity to oral lichen planus lesions. Furthermore, they do not support the hypothesis of oral lichen planus being an autoimmune disease.
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