Risk of Malignant Transformation in Patients With Oral Lichen Planus or Lichenoid Lesions: A Retrospective Study of 323 Patients With a Minimum of 5‐Year Follow‐Up

Key Points

• To assess the long-term risk of malignant transformation in patients with oral lichen planus (OLP) and lichenoid lesions (OLL).
• Retrospective analysis of 323 patients with a minimum 5-year follow-up
• Comparison of the risk of oral squamous cell carcinoma (OSCC) between OLP and OLL groups
• Examination of site-specific lesions associated with malignancy risk.
• Both OLP and OLL patients show a long-term risk of OSCC
• OLL patients have a higher risk of OSCC than OLP patients
• Certain site-specific lesions increase the risk of OSCC.