Abstract
BackgroundLinear cutaneous lupus erythematosus (LE) is an unusual form of LE-specific cutaneous condition, occurring in children and young adults. Due to its rarity, the diagnosis of linear cutaneous LE can be difficult and facial lesions can resemble linear morphea or en coup de sabre. Differential diagnosis of similar conditions along the lines of Blaschko must be differentiated from linear LE.Case presentationWe report a case of linear discoid LE on the forehead of an adult female Thai patient mimicking en coup de sabre. The dermatoscopy, histopathology and direct immunofluorescence findings were consistent with chronic cutaneous LE.ConclusionsAs this patient demonstrated classic dermatoscopic features of LE, we emphasized that the diagnosis of linear cutaneous LE can be made by dermatoscopy. This is particularly beneficial for young self-conscious patients with facial lesions that are reluctant to perform skin biopsy.
Highlights
Linear cutaneous lupus erythematosus (LE) is an unusual form of LE-specific cutaneous condition, occurring in children and young adults
We report a case of linear discoid LE on the forehead of an adult female patient mimicking en coup de sabre
To the best of our knowledge, this is the first case emphasizing on the characteristic dermatoscopic findings of Linear discoid lupus erythematosus (LDLE) on the forehead which are important information in differentiating discoid lupus erythematosus (DLE) from other linear conditions distributed along the lines of Blaschko
Summary
We hereby reported a case of adult-onset LDLE presented with linear erythematous to purplish atrophic patch on the forehead along the lines of Blaschko masquerading en coup de sabre. We would like to encourage physicians to use dermatoscopy to establish a clinical diagnosis, in young selfconscious patients with facial lesions and are hesitant to perform skin biopsy
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