title: Induction of eruptive benign melanocytic naevi by immune suppressive agents, including biologicals.
abstract: BACKGROUND
  Eruptive naevi have been described to potentially arise in immune compromised patients.
  
  
  OBJECTIVE
  We describe three patients with eruptive benign melanocytic naevi during a phase of immunosuppressive therapy. METHODS/DIAGNOSIS: Two patients with Crohn disease were treated with either azathioprine monotherapy or a combination of azathioprine and infliximab, when eruptive naevi arose particularly at the palms and soles. Our third patient with plaque psoriasis developed eruptive naevi during two episodes of treatment: during a course with the biological agent alefacept and during etanercept therapy.
  
  
  CONCLUSIONS
  We conclude that treatment with the recently available biological agents might be associated with the formation of eruptive naevi. Although positive evidence for the occurrence of malignant pigmented lesions is lacking, alertness to the development of eruptive melanocytic naevi during treatment with biological agents is indicated.
authors.affiliation: Department of Dermatology, Radboud University Nijmegen Medical Centre, and Department of Gastroenterology, Gelderse Vallei Hospital, Ede, the Netherlands. j.bovenschen@derma.umcn.nl
authors.forename: H J
authors.initials: HJ
authors.lastname: Bovenschen
authors.forename: M
authors.initials: M
authors.lastname: Tjioe
authors.forename: H
authors.initials: H
authors.lastname: Vermaat
authors.forename: D
authors.initials: D
authors.lastname: de Hoop
authors.forename: B M J
authors.initials: BM
authors.lastname: Witteman
authors.forename: R W A
authors.initials: RW
authors.lastname: Janssens
authors.forename: T J
authors.initials: TJ
authors.lastname: Stoof
authors.forename: P C M
authors.initials: PC
authors.lastname: van de Kerkhof
mesh_terms: D000328:Adult; D001379:Azathioprine / Q000009:adverse effects; D003875:Drug Eruptions / Q000209:etiology* / Q000276:immunology / Q000473:pathology; D005260:Female; D006801:Humans; D016867:Immunocompromised Host; D007155:Immunologic Factors / Q000009:adverse effects*; D007166:Immunosuppressive Agents / Q000009:adverse effects*; D008297:Male; D008875:Middle Aged; D009508:Nevus, Pigmented / Q000139:chemically induced* / Q000276:immunology / Q000473:pathology; D012878:Skin Neoplasms / Q000139:chemically induced* / Q000276:immunology / Q000473:pathology
chemical_list: D007155:Immunologic Factors; D007166:Immunosuppressive Agents; D001379:Azathioprine