Dermoscopy of Lichen Planus Follicularis Tumidus: A Case Report With Pattern Analysis and Literature Review

Abstract

Lichen planus follicularis tumidus (LPFT) is a rare variant of lichen planus presenting as erythematous to violaceous plaques with significant follicular involvement, most commonly in the retroauricular area. We report a case demonstrating a novel dermoscopic pattern reminiscent of a follicular galaxy, composed of variably sized comedo-like and milia-like structures with scaling, white halos, and rosettes on a pink-violaceous background. This distinctive pattern may help distinguish LPFT from mimics, such as comedonal discoid lupus erythematosus, milia en plaque, and follicular mucinosis. Additionally, a review of existing literature on LPFT dermoscopy is included.