Thus far, ten cases of acquired Blaschko der­matitis have been reported in literature, and seven of them have been reviewed in this present report (Table 1). All seven cases were adults and there was no gender predilection. The skin lesions revealed multiple lines and uni- or bilateral lesions. An histological examination showed spongiotic or interface dermatitis. Topical steroid ointments had been applied in four cases but were only effective in one case. Systemic steroid was prescribed for one patient who showed a good response. The other three cases had no treatment but all improved within several weeks. In most cases, the lesions fol­lowed the same clinical pattern of relapsing several times for months and years.

In contrast to other reported cases, our case oc­curred in a child. But, the patient showed his- tologically non-specific interface dermatitis without lichenoid infiltration, presenting as multiple lines on the trunk and leg. More strikingly, it showed a relapsing pattern. Therefore, this case was diagnosed as acquired Blaschko dermatitis rather than lichen striatus.
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Table 1. Previously described cases of acquired blaschko dermatitis


Reference


Age/Sex


Distribution of the skin lesion


Histopathology Treatment


Prognosis


Grosshans al.


et


38/M


Whole body


Spongiotic dermatitis


None


Spontaneous improvement after a few days or weeks, and relapse was noted


Megahed et al.


44/F


Left side of the upper and lower limb, chest and abdomen


Spongiotic dermatitis


Topical corticosteroid


After applying topical steroid for
2 weeks with
little success, there was spontaneous improvement noted after

6 weeks.


Lee et al.


27/M


Left side of the trunk and arm


Spongiotic dermatitis


Topical corticosteroid


Complete resolution after topical steroid treatment for a month with
relapse being noted


Betti et al.


24/F


Left side of the trunk


Interface dermatitis


None


Spontaneous improvement after 3 months


Lipsker et


al.


38/F


Whole body


Interface dermatitis


None


Spontaneous resolution within 4 weeks


Hale


64/M


Left side of the chest, abdomen, back and buttock


Spongiotic dermatitis


Topical corticosteroid


Topical steroid applied for
1 month with
little success


Bojanic et


al.


65/F


Right side of the lower limb


Interface dermatitis


Topical corticosteroid and oral corticosteroid


After applying topical steroid for 1 month with little success, complete
resolution after oral corticosteroid for 1 week and relapse was noted


Our case


2/F


Left side of the chest, abdomen, back and lower limb


Interface dermatitis


Topical corticosteroid and oral corticosteroid


After applying topical steroid for
4 months with
little success, complete resolution after oral corticosteroid for

10 days and
relapse was noted

Most cases of acquired dermatoses that present in a Blaschkolinear pattern in children are common dermatoses that are usually distributed in a random manner. They show the same clinical and histolo- gical pattern as the lesions of the common presentation. This occurs in psoriasis, lichen planus, or atopic dermatitis. A few acquired dermatoses always present in a linear pattern with their own clinical and histological characteristics, such as lichen striatus or Moulin disease. Acquired Blaschko dermatitis is a rare disease that has only been described in adults.
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