Lichen planus is an inflammatory dermatosis with a prevalence of approximately 1%. Recent meta-analyses show that patients with hepatitis C virus have a 2.5- to 4.5-fold increased risk of developing lichen planus. Lichen planus has also followed vaccinations and has specifically been attributed to the hepatitis B vaccine, the influenza vaccine, and the tetanus-diphtheria-acellular pertussis vac...

•Lichen sclerosus in females primarily involves the hairless anogenital skin.•Skin tissue outside this area is constitutionally not at risk for lichen sclerosus.•Transplantation into the vulvar field may turn skin susceptible to lichen sclerosus.•Tissue inherent positional information might affect lichen sclerosus susceptibility.

Erosive lichen planus is an uncommon variant of lichen planus. Chronic erosions of the soles, accompanied by intense and disabling pain, are some of its most characteristic manifestations. We present the case of a woman who developed oral and plantar erosive lichen planus associated with lichen planus pigmentosus and ungueal lichen planus that were diagnosed after several years. The patient fai...

BACKGROUND & AIMS There is a close relationship between hepatitis C virus (HCV) infection and lichen planus, a chronic inflammatory mucocutaneous disease. We performed a genome-wide association study (GWAS) to identify genetic variants associated with HCV-related lichen planus. METHODS We conducted a GWAS of 261 patients with HCV infection treated at a tertiary medical center in Japan from Oc...

2 Copeman PWM, Tan RSH, Timlin D, et al. Familial lichen planus. Another disease or distinct people? Br J Dermatol 1978; 98 : 573–577. 3 Sodaify M, Vollum DI. Familial lichen planus. Br J Dermatol 1978; 98 : 579–581. 4 Grunnet N, Schmidt H. Occurrence of lichen planus in a family. Genetic susceptibility or coincidence? Clin Exp Dermatol 1983; 8 : 397–400. 5 Kofoed ML, Wantiz GL. Familial lichen...

Lichen planus is a chronic mucocutaneous T-cell-mediated disease, the cause of which remains unknown. The first case of lichen planus that transformed into squamous cell carcinoma was reported in 1903. The presented study concerns the case of a 62-year-old woman in whom twice malignant transformation of hypertrophic lichen planus in the dorsal part of the left foot developed. Several studies ha...

BACKGROUND The association between lichen sclerosus and vulvar squamous cell carcinoma (VSCC) has long been recognized, but large epidemiologic studies are lacking. METHODS Data of women diagnosed with vulvar pathology in the Netherlands were retrieved from the Dutch Pathology Registry. All vulvar pathology reports of this historical cohort were reviewed to construct a research database, incl...

Porokeratotic Variant of Lichen Planus: Lichen planus (LP) is a well-known dermatologic disorder with various different clinical presentations. We present a case of patient who was found to have porokeratotic lichen planus, a previously unreported variant of LP.