Lupus erythematosus-like imiquimod reaction: a diagnostic pitfall.

Abstract:

:Imiquimod (AldaraTM), a Toll-like receptor 7 agonist (TLR7), is known for its unique properties of being an immune response modifier and stimulator. Upon topical application, this TLR7 agonist triggers a cell-mediated immune response predominantly expressed by dendritic cells and monocytes. Local skin irritation at the application site involving erythema, pain, crusting and erosions is common and well documented. On the contrary, the specific histopathologic features associated with these treatment site reactions is not. Herein reported is a case where historical omission of imiquimod use for actinic keratosis complicated the histologic interpretation. We highlight a lupus erythematosus-like microscopic pattern and explore histopathologic features that could help in avoiding a diagnostic pitfall, as well as the relationship between TLR activation, cell-mediated immunity and skin histology.

journal_name

J Cutan Pathol

authors

Barr KL,Konia TH,Fung MA

doi

10.1111/j.1600-0560.2010.01592.x

subject

Has Abstract

pub_date

2011-04-01 00:00:00

pages

346-50

issue

4

eissn

0303-6987

issn

1600-0560

pii

CUP1592

journal_volume

38

pub_type

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