Double ring sign as a specific dermoscopic feature of lichen planopilaris: Toward a deeper understanding of disease.

The hyperkeratosis shows alternating circumferential para- and ortho-keratosis around the hair shaft (D). gl We evaluated the available dermoscopic images of 102 pathologically confirmed cicatricial-alopecia patients with clinically active disease. For instance, alopecia areata presents with Pohl-Pinkus constrictions.[6] We believe along with LPP, in other cicatricial alopecia like DLE or folliculitis decalvance, the same intermittent inflammation may occur. Lichen planopilaris (LPP) is the most common primary cicatricial alopecia defined by the follicular form of lichen planus.[1] Histopathologic examination is considered the gold standard diagnostic method. [Extracted from the article]