Isolated Linear Discoid Lupus Erythematosus of Scalp Following Lines of Blaschko

Abstract

Discoid lupus erythematosus (DLE) is an inflammatory autoimmune disease leading to scarring and hair loss. Linear Discoid lupus erythematosus has been mentioned in the literature as a rare variant. This article describes isolated linear DLE of the scalp. We present a 26-year-old Saudi male who had unilateral linear DLE of the scalp with no involvement of other body sites and no systemic manifestations. This case is the first case of isolated linear DLE on the scalp. This presentation should be considered as a differential diagnosis of linear scarring alopecia as a distinct morphological pattern of DLE.

Linear papules, plaques, and ulcers in a boy

“…Features suggestive of active LE in our patient were linear vessels, structureless white areas, white scales, and follicular plugs. Similar features have been described in two cases of linear LE 7,8 . Dermoscopic features reflecting long‐standing disease are reticulate pigmentation, pigment granules, and white structureless areas 2,5 …”

Diagnostic Accuracy of Trichoscopy in Inflammatory Scalp Diseases: A Systematic Review

“…Vessels. Arborizing red lines were observed in 65/157 (41.4%) patients [4,28,33,36,[47][48][49][50]53].…”

“…Twelve original studies and 6 case reports, including a total of 157 patients, reported on trichoscopy in discoid lupus erythematosus [4,17,28,29,33,36,44,[47][48][49][50][51][52][53][54][55][56][57].…”

“…Other. Follicular plugs were reported in 70/157 (44.6%) patients [36,[48][49][50][51][52] (Fig. 4c, d).…”