Persistent eruptive lentiginosis in a psoriatic patient after 4‐year effective treatment with ustekinumab

Abstract

We herein report the case of a 48-year-old man with Fitzpatrick skin type II who has been affected by psoriasis since the adolescence. He was treated with topical products until he started therapy with methotrexate at the age of 39. Both therapies were not able to achieve successful results. He arrived at our attention at the age of 44 with a progressive worsening of the psoriasis with diffuse erythematous desquamative plaques on the trunk and F I G U R E 1 Clinical manifestation of eruptive lentiginosis in previous sites of psoriatic plaques on the back (A), abdomen (B), thigh (C) with dermoscopic pattern referable to lentigo (D) Michele Parietti and Lorenza Burzi share first authorship.