Pediatric lichen planus pigmentosus possibly triggered by mercury dental amalgams

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.

Liquen plano en ni�os: t�pico y pigmentoso

“…Por vía sistémica se administran griseofulvina, prednisona, etretinato y cloroquina 5 . En casos de alergia a metales, como amalgamas de uso dental, su remoción se acompaña de mejoría notable 21 . La hiperpigmentación posinflamatoria aparece a menudo después del tratamiento del LP y el LPP, y puede tardar meses o años en desaparecer 12 .…”