title: Intractable genital ulcers from herpes simplex virus reactivation in drug-induced hypersensitivity syndrome caused by allopurinol.
abstract: BACKGROUND
  Drug-induced hypersensitivity syndrome (DIHS/DRESS) is a severe adverse systemic reaction. Reactivation of human herpesvirus (HHV) family members other than HHV-6 has been reported in patients with DIHS. Reactivation of HHV family members is generally characterized by increased serum antibody titers against the virus. By contrast, clinical symptoms caused by viral reactivation are relatively rare.
  
  
  METHODS
  We report a case of DIHS with intractable genital ulcers from reactivation of herpes simplex virus (HSV) in accordance with reactivation of HHV-6 and cytomegalovirus (CMV).
  
  
  RESULTS
  Twenty-two days after the onset of the rash, the patient developed intractable genital ulcers that were resistant to treatment. Histological examination of the ulcers revealed necrotic degeneration in the epidermal cells, with giant cells containing inclusion bodies and marked lymphocytic infiltration in the upper dermis. Immunohistochemical staining with antibodies reactive to HSV or CMV showed that these giant cells were positive for HSV but negative for CMV.
  
  
  CONCLUSIONS
  Genital herpes is a common skin disease. However, our case was considered to be a DIHS-associated symptom, not an accidental complication, as the symptoms were severe and resistant to treatment.
authors.affiliation: Department of Dermatology, Kanazawa University Graduate School of Medical Science, Kanazawa, Japan. yasuhito@med.kanazawa-u.ac.jp
authors.forename: Yasuhito
authors.initials: Y
authors.lastname: Hamaguchi
authors.forename: Manabu
authors.initials: M
authors.lastname: Fujimoto
authors.forename: Yuri
authors.initials: Y
authors.lastname: Enokido
authors.forename: Takamasa
authors.initials: T
authors.lastname: Wayaku
authors.forename: Kenzo
authors.initials: K
authors.lastname: Kaji
authors.forename: Takeshi
authors.initials: T
authors.lastname: Echigo
authors.forename: Kazuhiko
authors.initials: K
authors.lastname: Takehara
mesh_terms: D000369:Aged, 80 and over; D000493:Allopurinol / Q000009:adverse effects*; D004342:Drug Hypersensitivity / Q000150:complications*; D006074:Gout Suppressants / Q000009:adverse effects; D006558:Herpes Genitalis / Q000150:complications*; D006801:Humans; D033461:Hyperuricemia / Q000188:drug therapy*; D008297:Male; D012883:Skin Ulcer / Q000821:virology*; D014775:Virus Activation / Q000187:drug effects
chemical_list: D006074:Gout Suppressants; D000493:Allopurinol