A Case of Multiple Linear Lichen Planus along the Lines of Blaschko / 대한피부과학회지

ABSTRACT

Linear lichen planus (LLP) is a rare variant of lichen planus, which accounts for 0.24-0.62% of all patients with lichen planus. Blaschko lines are the pattern assumed by many different nevoid and acquired skin diseases on the human skin, which present with a characteristic S-shape on the abdomen, a V-shape near the posterior midline, a linear pattern on the lower trunk and limbs, and whorls on the scalp and abdomen. Multiple LLP along the lines of Blaschko has been rarely reported. Differential diagnosis of LLP includes lichen striatus, epidermal nevi, linear psoriasis, inflammatory linear verrucous epidermal nevus (ILVEN), linear Darier disease, linear lupus erythematosus, and linear lichen nitidus. We herein describe a 49-year-old female who showed multiple linear erythematous, brownish papules on her right trunk, shoulder, arm, and groin with typical histopathologic findings of lichen planus.