title: Annular Lichenoid Dermatitis of Youth: Report of Six New Cases with Review of the Literature.
abstract: BACKGROUND
  Annular lichenoid dermatitis of youth (ALDY) is an uncommon disease clinically reminiscent of morphea, annular erythema or mycosis fungoides.
  
  
  OBJECTIVE
  To describe the histological and clinical features of a small series of patients with ALDY and to review the literature.
  
  
  METHODS
  We describe the clinical and histological features of six patients (age range 7-79 years) with asymptomatic erythematous macules and patches with a red-brownish border and central hypopigmentation, mostly distributed on the groin and flanks. Histologically, all cases showed lichenoid dermatitis limited to the tips of rete ridges, with many intraepidermal CD8+ and some CD4+ T cells. T cell receptor rearrangement was absent in all cases. A total of 44 patients with a consistent clinical and histological picture have been described. The disease is sensitive to topical and/or systemic corticosteroids.
  
  
  CONCLUSIONS
  ALDY is a unique lichenoid dermatitis for whose diagnosis a clinical-pathological correlation is essential. The disease typically affects young patients, more rarely adults and elderly.
authors.affiliation: Section of Dermatology and Venereology, Department of Medicine, University of Verona, Verona, Italy.
authors.forename: Marco
authors.initials: M
authors.lastname: Di Mercurio
authors.forename: Paolo
authors.initials: P
authors.lastname: Gisondi
authors.forename: Chiara
authors.initials: C
authors.lastname: Colato
authors.forename: Donatella
authors.initials: D
authors.lastname: Schena
authors.forename: Giampiero
authors.initials: G
authors.lastname: Girolomoni
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D001706:Biopsy; D002648:Child; D003872:Dermatitis / Q000473:pathology*; D003937:Diagnosis, Differential; D005260:Female; D006801:Humans; D017512:Lichenoid Eruptions / Q000473:pathology*; D008297:Male; D008875:Middle Aged; D012189:Retrospective Studies; D055815:Young Adult