SDC1 and oral lichen planus: There was no association between the histological features of OLP and expression of CD138 and the only associationbetween histological features and CD20 expression was found in the pattern of keratosis; lesions with parakeratotic surface showed significant higher intensity of CD20 expression.In our study, B cells were present within the inflammatory infiltrate of all OLPs counting for less than 50% of the inflammatory cells in 91.8% of the cases.