Introduction. Lichen planus is a chronic inflammatory skin disease known to have several clinical variants with attended variable clinical outcomes. Certain complications have been observed in the hypertrophic type, which were not found in association with the classic variant. Objective: To identify the epidemiologic and clinical differences between the classic and hypertrophic lichen planus and clinical correlates. Material and Methods. Of 104 participants with lichen planus included in the study, 49 had classic and 55 hypertrophic lichen planus. Demographic and clinical information was obtained. Diagnosis of lichen planus was made clinically and confirmed with histology. The participants were screened for metabolic syndrome, hepatitis B, and C. Results: Mean age of all patients was 37.20±13.39 years, with no age and gender differences between the participants with classic and hypertrophic lichen planus. Classic lichen planus was more likely to be painful, (8.2% vs 0.0, p=0.046), generalized (95.9% vs 16.4%, p<0.001), involve the oral mucosa (38.8% vs 0.0, p<0.001), the nails (38.8% vs 1.8, p<0.001), present with kobnerisation (55.1% vs 5.5%,<0.001), Wickhiam striae (69.4% vs 16.4%, p<0.001), associated with Hepatitis B vaccination (16.3% vs 3.6%, p<0.028) and anti HCV positivity (16.3% vs 0.0%, p=0.002). Hypertrophic lichen planus was significantly associated with impaired glucose tolerance/diabetes mellitus (16.4% vs 2.0%, p=0.013), dyslipidemia (74.5% vs 40.8%, p=0.001) and saw-tooth histologic appearance compared to classic type. Conclusion: Hypertrophic lichen planus is more likely to be associated with metabolic complications compared to the classic type. Further studies are needed to loink this difference t chronic inflamation.
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