Halonen PM et al. -Patients diagnosed with lichen planus (LP) are at increased risk for developing cancer on mucosa of the upper gastrointestinal tract, larynx, and vulva.

Methods
13,100 patients diagnosed with LP were linked with subsequent cancer diagnoses from the Finnish Cancer Registry

Results
1520 women with LP were diagnosed with cancer (standardized incidence ratio [SIR] = 1.15).
LP was associated with an increased risk of cancer of the lip (SIR = 5.17), tongue (SIR = 12.4), oral cavity (SIR = 7.97), esophagus (SIR = 1.95), larynx (SIR = 3.47), and vulva (SIR = 1.99).