title: [Particular histological features of a case of Sweet's syndrome induced by G-CSF].
abstract: BACKGROUND
  Sweet's syndrome may occur during medullar aplasia, especially after treatment with exogenous growth factors such as G-CSF. In this context, Sweet's syndrome presents particular histological features that we detail in this observation.
  
  
  METHODS
  A 50 year-old man was treated for multiple myeloma with a mobilizating chemotherapy prior to autologous stem cell transplantation. Four days after the onset of G-CSF, he presented with a febrile generalized eruption of erythematous infiltrated lesions. Histological examination of a skin biopsy showed a neutrophilic infiltrate associated with atypical xanthomized histiocytes and vascular hyperplasia with marked endothelial turgescence. Treatment with a short cause of oral corticosteroids was efficient.
  
  
  CONCLUSIONS
  The classical histological features of Sweet's syndrome consist in a dermal neutrophilic infiltrate with edema. In our patient, we noticed the presence of atypical histiocytes among the dermal neutrophilic infiltrate. These histiocytes are described in maculo-papular eruptions induced by G-CSF, and should not be confused with a malignant infiltrate associated with a hemopathy. Vascular hyperplasia may be related to the angiogenic properties of G-CSF. Knowledge of these histological features would enable clinicians and histologists to recognize the appropriate diagnosis.
authors.affiliation: Service de Dermatologie I, Hôpital Saint-Louis, 1, avenue Claude Vellefaux, 75010 Paris.
authors.forename: S
authors.initials: S
authors.lastname: Abecassis
authors.forename: S
authors.initials: S
authors.lastname: Ingen-Housz-Oro
authors.forename: B
authors.initials: B
authors.lastname: Cavelier-Balloy
authors.forename: B
authors.initials: B
authors.lastname: Arnulf
authors.forename: H
authors.initials: H
authors.lastname: Bachelez
authors.forename: L
authors.initials: L
authors.lastname: Dubertret
mesh_terms: D016179:Granulocyte Colony-Stimulating Factor / Q000009:adverse effects*; D006801:Humans; D008297:Male; D008875:Middle Aged; D016463:Sweet Syndrome / Q000139:chemically induced* / Q000473:pathology*
chemical_list: D016179:Granulocyte Colony-Stimulating Factor