Inclusion criteria
OLP
SYSTEMIC DISEASE

Patients were more than 18 years old.Patients were free from any systemic disease according to the detailed questionnaire of the modified Cornell Medical Index [Patients clinically diagnosed by a dermatologist and oral medicine specialist as suffering from OLP.Patients who agreed to the biopsy in undiagnosed casesClinical and histopathological criteria were used according to modified WHO diagnostic criteria for OLP [Patients who were willing to participate in this study (who agreed to give informed consent) and had the ability to complete the study.