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Pediatr Dermatol ; 37(2): 375-376, 2020 Mar.
Article in English | MEDLINE | ID: mdl-31876002

ABSTRACT

Lichen planus pigmentosus is uncommon in childhood and its treatment is often challenging. We report a case of cutaneous lichen planus pigmentosus in a 10-year-old boy, without oral mucosal involvement, two months after an amalgam dental restoration. The diagnosis was based on the histopathological examination of a skin biopsy, the positive patch test to mercury, and the improvement after amalgam removal. Our case report suggests that metal allergy may play a role, and amalgam replacement may be followed by clinical improvement.


Subject(s)
Dental Amalgam/adverse effects , Hyperpigmentation/etiology , Hyperpigmentation/pathology , Hypersensitivity, Delayed/complications , Lichen Planus/etiology , Lichen Planus/pathology , Child , Humans , Hypersensitivity, Delayed/diagnosis , Male , Patch Tests
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