title: [Cutaneous and neurologic vasculitis disclosing EBV-selective immunodeficiency].
abstract: BACKGROUND
  Purtilo's syndrome or X-linked lymphoproliferative syndrome (XLP) is a rare genetic disorder affecting boys who have a selective immunodeficit towards Epstein Barr Virus (EBV) and who develop extremely severe forms of EBV infection, of which there are four major types: severe or fatal infectious mononucleosis (60 p. 100), lymphoma (23 p. 100), acquired hypo- or agamaglobulinemia (25 p. 100) and anemia or pancytopenia. We report a case of vasculitis (cutaneous and neurologic) which led to the discovery of a selective immunodeficit towards EBV, similar to Purtilo's syndrome.
  
  
  METHODS
  A 17 year-old male with no significant past medical history presented with an eruption initially felt to be consistent with pityriasis lichenoid. Treatment with erythromycin was initiated, this did not prevent the subsequent eruptions of cutaneous vasculitis lesions which were severe, prolonged, debilitating, and associated with fever and general deterioration of the patient condition. All etiologic studies were negative. A course of systemic corticosteroids was begun, but the cutaneous eruptions persisted; and in addition the patient developed signs of polyneuropathy in the lower extremities secondary to neurologic vasculitic lesions. New studies revealed an abnormal EBV serology (absence of anti-EBNA antibodies) as well as hypogammaglobulinemia, suggestive of a selective immunodeficit towards EBV resembling Purtilo's syndrome.
  
  
  CONCLUSIONS
  In our patient, the development of an extensive vasculitis, characterized histologically by an intense lymphocytic infiltrate, positive for EBV, associated with hypogammaglobulinemia, and with abnormal serology suggests an anomaly in the immune response to EBV. Although the age of the patient and absence of family history make the Purtilo's syndrome uncertain, the nature of the immunodeficit is very similar and the patient could well develop a lymphoma. This case is significant in that the disease initially manifested itself as a cutaneous vasculitis, which was not been described previously.
authors.affiliation: CHU de Nantes, Hötel-Dieu.
authors.forename: C
authors.initials: C
authors.lastname: Grosieux
authors.forename: J C
authors.initials: JC
authors.lastname: Amoric
authors.forename: F
authors.initials: F
authors.lastname: Mechinaud
authors.forename: A
authors.initials: A
authors.lastname: Moreau
authors.forename: J M
authors.initials: JM
authors.lastname: Mussini
authors.forename: H
authors.initials: H
authors.lastname: Fesneau
authors.forename: B
authors.initials: B
authors.lastname: Dreno
authors.forename: B
authors.initials: B
authors.lastname: Bureau
authors.forename: J F
authors.initials: JF
authors.lastname: Stalder
authors.forename: P
authors.initials: P
authors.lastname: Litoux
mesh_terms: D000293:Adolescent; D006566:Herpesviridae Infections / Q000150:complications* / Q000235:genetics / Q000276:immunology / Q000628:therapy; D004854:Herpesvirus 4, Human / Q000276:immunology*; D006801:Humans; D007153:Immunologic Deficiency Syndromes / Q000150:complications* / Q000235:genetics; D008297:Male; D017445:Skin Diseases, Vascular / Q000209:etiology* / Q000276:immunology / Q000473:pathology / Q000628:therapy; D013577:Syndrome; D017211:Treatment Failure; D014657:Vasculitis / Q000209:etiology*
vernacular_title: Vasculite cutanée et neurologique révélatrice d'un déficit immunitaire sélectif vis-à-vis du virus d'Epstein-Barr.