Hypertrophic Lichen Planus: Importance of Follow-Up and Clinicopathologic Correlation

Context.— Hypertrophic lichen planus (HLP) is a variant of lichen planus that can be difficult to diagnose based on histopathologic features alone. Thus, patient clinical history and clinicopathologic correlation are essential considerations to make the correct diagnosis. Objective.— To discuss the clinical and histologic presentation of HLP and provide a thorough review of commonly encountered mimickers in the differential diagnosis. Data Sources.— Data were derived from a literature review, personal clinical and research experiences, and a review of cases in the archives of a tertiary care referral center. Conclusions.— In general, HLP involves the lower extremities and is characterized by thickened, scaly nodules and plaques that are often pruritic and chronic in nature. HLP affects both males and females and is most common in adults 50 to 75 years of age. Unlike conventional lichen planus, HLP tends to have eosinophils and classically displays a lymphocytic infiltrate most concentrated around the tips of rete ridges. The differential diagnosis for HLP is broad and encompasses numerous entities in many different categories, including premalignant and malignant neoplasms, reactive squamoproliferative tumors, benign epidermal neoplasms, connective tissue disease, autoimmune bullous disease, infection, and drug-related reactions. Therefore, a high index of suspicion must be maintained to avoid a misdiagnosis and potential inappropriate treatments.

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Hypertrophic Lichen Planus: An Up-to-Date Review and Differential Diagnosis

Whittington

Saleh

Bresler

et al. 2023

Archives of Pathology &Amp; Laboratory Medicine

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Hypertrophic Lichen Planus: Importance of Follow-Up and Clinicopathologic Correlation

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Hypertrophic Lichen Planus: An Up-to-Date Review and Differential Diagnosis

Hypertrophic Lichen Planus: An Up-to-Date Review and Differential Diagnosis

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