Interface dermatitis along Blaschko's lines.

Abstract:

:Linear dermatoses are fascinating entities that likely reflect embryologically derived cutaneous mosaicism, even when they occur after childhood. Adult blaschkitis is a rare, relapsing inflammatory dermatitis that most often presents in middle age. It presents clinically as a pruritic eruption of linear papules, vesicles and plaques, and is most commonly found to have features of spongiotic dermatitis on pathology. However, the clinical and histopathologic presentation of lichen striatus in adults may be similar to those of adult blaschkitis. A case in which 'blaschkitis' was suspected clinically is presented, in which the biopsy showed non-characteristic microscopic features resembling erythema multiforme--a finding rarely reported in the literature to date. We present this case and a brief review of the most commonly acquired linear eruptions following Blaschko's lines with the goal of expanding the histopathologic findings that may be encountered in adult blaschkitis. Moreover, the clinical and histopathologic overlap between the entities of blaschkitis and lichen striatus is explored, acknowledging that these entities may exist on a clinicopathologic spectrum. In the diagnosis of linear eruptions, clinicopathologic correlation is important for arriving at an accurate final diagnosis.

journal_name

J Cutan Pathol

authors

Johnson M,Walker D,Galloway W,Gardner JM,Shalin SC

doi

10.1111/cup.12412

subject

Has Abstract

pub_date

2014-12-01 00:00:00

pages

950-4

issue

12

eissn

0303-6987

issn

1600-0560

journal_volume

41

pub_type

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