%0 Journal Article
%T Lentiginous eruption in resolving psoriasis plaques during treatment with ixekizumab: a case report and review of the literature
%A Claudia Morales
%A Fernando Valenzuela
%A Pablo Santa Mar¨ªa
%A Raul De la Fuente
%A Roberto Cullen
%J -
%D 2017
%R https://doi.org/10.4081/dr.2017.7079
%X We report the case of a 56-year old male with severe plaque psoriasis that was successfully treated with ixekizumab, a new anti interleukin (IL)-17 monoclonal antibody. During the first months of treatment he developed a lentiginous eruption in the sites of rapidly resolving plaques. Biopsy and immunohistochemistry reports showed elements of both lentigo and post-inflammatory hyper pigmentation. These findings, which have been increasingly described in anti-tumor necrosis factor alpha (TNF¦Á) and anti IL-12/IL-23 therapy, may be explained by the down regulating effect of TNF¦Á and IL-17 on pigmentation genes, which is very rapidly suppressed by ixekizumab, resulting in hyper pigmentation, and by the alteration of mesenchymal-epidermal interaction via keratinocyte growth factor during the inflammatory period, which results in the development of histopathological elements of lentigo.
%U https://www.pagepress.org/journals/index.php/dr/article/view/7079