title: Oral lichenoid lesions - a review and update.
abstract: BACKGROUND
  Oral lichenoid lesions or reactions (OLLs/OLRs) are clinical and histological contemporaries of the classical oral lichen planus (OLP) that have generated a lot of debate in literature. In contrast to the idiopathic nature of OLP, OLLs are often associated with a known identifiable inciting factor. A superficial examination of these lesions clinically and histologically often reveals many similarities with OLP, but recent data indicate that distinguishable features do exist and form the basis of most classifications.
  
  
  OBJECTIVE
  This paper attempts to collate available data in English literature on OLLs, highlight distinguishing features clinically and histologically and reflect on the malignant transformation potential and treatment modalities of the condition.
  
  
  METHODS
  A comprehensive search of medical and dental databases including PubMed, Ovid, Cochrane, Pubget, Researchgate, and non-medical search engines were utilized for the review. The search words included "oral lichen planus", "oral lichenoid lesions", "oral drug reactions", "lichenoid dysplasia", and "adverse effects of dental materials".
  
  
  RESULTS
  OLLs seem to grossly underrated and most cases were clubbed as OLP. Definite clinical and histological features were uncovered to establish the identity of this lesion. Associations with dental restorative materials, drugs, and medications have been conclusively proven in the etiology of this condition. Specific markers are being utilized to diagnose the condition and monitor its progress.
  
  
  CONCLUSIONS
  Substantial differentiating features were uncovered to delineate OLLs as a separate entity with definite etiology, pathogenesis, and a high malignant transformation rate compared with OLP.
authors: Department of Oral and Maxillofacial Pathology, Dr. Syamala Reddy Dental College, Hospital and Research Centre, Munnekolala, Marathalli, Bangalore, Karnataka, India.
authors: Venkatesh Vishwanath
authors: VV
authors: Kamath
authors: Department of Oral and Maxillofacial Pathology, Dr. Syamala Reddy Dental College, Hospital and Research Centre, Munnekolala, Marathalli, Bangalore, Karnataka, India.
authors: Krishnanand
authors: K
authors: Setlur
authors: Department of Oral and Maxillofacial Pathology, Dr. Syamala Reddy Dental College, Hospital and Research Centre, Munnekolala, Marathalli, Bangalore, Karnataka, India.
authors: Komali
authors: K
authors: Yerlagudda
keywords: Drug association; literature review.malignant transformation; oral lichen planus; oral lichenoid lesions; oral lichenoid reactions
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