title: Cutaneous polyarteritis nodosa. Reports of two cases in children and review of the literature.
abstract: BACKGROUND
  Polyarteritis nodosa (PAN) is a necrotizing vasculitis of small- and medium-sized arteries that most often affects the kidneys, heart, and liver but can affect any organ system. A cutaneous form of PAN without visceral involvement, which follows a benign but often chronic course, has also been described. Both forms are rare in children.
  
  
  METHODS
  We describe two children with cutaneous PAN who were admitted to The Johns Hopkins Children's Center, Baltimore, Md, within a 1-week period. Both girls, aged 2 and 6 years old, presented with multiple, red, painful, edematous nodules on the extremities, face, and trunk. Dermatologic findings were accompanied by fever, arthralgias, and arthritis, but neither child had evidence of severe systemic disease. Skin biopsy specimens revealed necrotic small- and medium-sized muscular arteries with neutrophilic and eosinophilic infiltrate and fibrin thrombi. Both patients responded to treatment with prednisone.
  
  
  CONCLUSIONS
  In children with cutaneous PAN, systemic symptoms may be present, but the lack of life-threatening complications distinguishes this relatively benign disease from systemic PAN.
authors.affiliation: Division of Pediatric Dermatology, Johns Hopkins Medical Institutions, Baltimore, Md.
authors.forename: G K
authors.initials: GK
authors.lastname: Siberry
authors.forename: B A
authors.initials: BA
authors.lastname: Cohen
authors.forename: B
authors.initials: B
authors.lastname: Johnson
mesh_terms: D001706:Biopsy; D002648:Child; D002675:Child, Preschool; D005260:Female; D006801:Humans; D010488:Polyarteritis Nodosa / Q000473:pathology*; D012871:Skin Diseases / Q000473:pathology*