BLASCHKO DERMATITIS/BLASCHKITIS

By Gary M. White, MD

Blaschkitis This 40-year-old woman experienced the acute onset of itchy, swirly lines. Biopsy showed features of both morphea and lichen sclerosis.


Blaschkitis is a term used to describe acquired, unilateral skin lesions following Blaschko's lines in an adult. In one case, an abnormality of chromosome 18 was found in diseased skin but not in normal skin [Arch Dermatol 2000;136;805].

Clinical

Erythematous papules, papulovesicles and eczematous areas are the primary lesion. Diffuse erythema and scale of the palms may occur. It may be that this disease merely represents more extensive lichen striatus. Histology is variabe and can show spongiotic, lichenoid and papulosquamous features.

Treatment

Lesions heal spontaneously but relapses are common. A potent topical steroid e.g. clobetasol may be helpful [Dermatology Online Journal 21;11].

Additional Pictures

Blaschkitis

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