title: Immediate and delayed hypersensitivity to systemic corticosteroids:  2 case reports.
abstract: BACKGROUND
  Both immediate, type I reactions and delayed hypersensitivity, type IV reactions to systemic corticosteroid preparations have been reported. Type I reactions are rare, with delayed hypersensitivity reactions being slightly more common.
  
  
  METHODS
  A 33-year-old woman presented repeatedly to the emergency department with asthma attacks. She developed pruritus and hives approximately 30 minutes after the administration of parenteral corticosteroids. Her respiratory status deteriorated approximately 6 hours after she received the corticosteroids. An acute eczematous dermatitis on her face, neck, and upper body appeared 24 hours after administration of the corticosteroids. The dermatitis peaked at 72 hours. Intradermal testing to Solu-Medrol, Solu-Cortef, prednisone, and Decadron confirmed a type I, anaphylactoid reaction. The dermatitis that presented 24 hours after administration of the parenteral corticosteroids is consistent clinically with a type IV delayed hypersensitivity reaction to the corticosteroids. A second patient, a 51-year-old woman, developed urticarial lesions that lasted approximately 30 minutes, immediately after intralesional triamcinolone injections for keloid scars. Intradermal testing was performed. She showed a positive reaction to triamcinolone confirming a type I allergy to this steroid.
  
  
  CONCLUSIONS
  It is important to consider an allergy to corticosteroids in patients with worsening anaphylactic symptoms after administration of systemic corticosteroids.
authors.affiliation: University of Ottawa, Ottawa, Ontario, Canada. lfratesi@hotmail.com
authors.forename: Lauren
authors.initials: L
authors.lastname: Laberge
authors.forename: Melanie
authors.initials: M
authors.lastname: Pratt
mesh_terms: D000328:Adult; D000707:Anaphylaxis / Q000139:chemically induced; D001249:Asthma / Q000139:chemically induced / Q000175:diagnosis*; D003875:Drug Eruptions / Q000175:diagnosis* / Q000209:etiology; D005260:Female; D005938:Glucocorticoids / Q000008:administration & dosage / Q000009:adverse effects*; D006801:Humans; D006968:Hypersensitivity, Delayed / Q000175:diagnosis* / Q000209:etiology; D006969:Hypersensitivity, Immediate / Q000175:diagnosis* / Q000209:etiology; D008875:Middle Aged; D010328:Patch Tests
chemical_list: D005938:Glucocorticoids