Colocalization of alopecia areata and lichen planus.

Three months after the appearance of the initial lesion he developed a solitary violaceous papule in the center of the patch (Figure 1). The lesion was pruritic and mildly scaly. No mucosal lesion was present. A biopsy from the patch of alopecia revealed a typical perifollicular “swarm of bees” type lymphocytic infiltrate consistent with a diagnosis of alopecia areata (AA) (Figure 2). A biopsy from the central papular lesion showed hyperkeratosis, wedge-shaped hypergranulosis, irregular acanthosis, basal cell liquefaction and a band-like lymphocytic