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Background: Scalp discoid lupus erythematosus in Caucasians is still a rare disease with a variable clinical presentation. Its dermoscopic characteristics are poorly described in literature, especially in the white population. The aim of this review was to critically analyze published papers on this topic and summarize relevant features., Summary: A comprehensive search for eligible articles was conducted in the databases of MEDLINE/PubMed. Results were analyzed following dermoscopic patterns such as follicular openings, hair shafts, perifollicular surface, and vessel pattern., Key Messages: The most representative features appeared the absence of follicular openings and the presence of follicular keratotic plugs, along with yellow-brown and red dots. In long-lasting lesions with chronic stage, trichoscopy showed the absence of follicular openings, white or milky red cicatricial patches, white and brown structureless areas, and thick arborizing vessels., Competing Interests: The authors have no conflicts of interest to declare., (© 2024 S. Karger AG, Basel.)

Neoplastic alopecia (NA) is defined as an organized hair loss in single or multiple areas of the scalp caused by a primary tumor that has metastasized to the skin of the scalp. Due to its localization and clinical appearance, NA should be placed in differential diagnosis with alopecia areata or other entities. To date, pathognomonic dermoscopic criteria of NA have not yet been described: the absence of classical criteria of other scalp diseases in addition to a major neovascularization with on-focus arborizing vessels and erosions or ulcerations may help the clinician to suspect a diagnosis of secondary alopecia. Dermatologists should pay more attention to these rare forms of secondarism because in exceptional cases, a simple alopecia of the scalp can hide a new, relapsing or metastatic neoplasia., Competing Interests: The authors declare to have no conflicts of interest for the publication of this article., (Copyright © 2021 by S. Karger AG, Basel.)