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[Methylprednisolone-induced acute generalized exanthematous pustulosis]
C Mussot-Chia1, M L Flechet, M Napolitano
1Services de Médecine Interne et de Neurologie, Hôpital de la Pitié-Salpêtrière, Paris.
Annales De Dermatologie Et De Venereologie
|April 25, 2001
Summary
A rare drug allergy, acute generalized exanthematous pustulosis, was triggered by methylprednisolone, a corticosteroid. This case highlights delayed hypersensitivity reactions to corticosteroids, emphasizing the importance of allergy testing.
Area of Science:
- Dermatology
- Allergology
- Pharmacology
Background:
- Acute generalized exanthematous pustulosis (AGEP) is a rare but severe cutaneous adverse drug reaction.
- Generalized reactions to systemically administered corticosteroids are exceptionally rare.
- Methylprednisolone, a common corticosteroid, is rarely implicated in AGEP.
Observation:
- A 30-year-old woman developed AGEP hours after intravenous methylprednisolone for multiple sclerosis.
- The patient presented with a widespread maculopapular rash that rapidly became pustular, accompanied by fever and neutrophilia.
- Histopathology and negative cultures confirmed AGEP; the rash resolved spontaneously within a week.
Findings:
- Epicutaneous testing one month later confirmed a delayed-type hypersensitivity to Group A corticosteroids, including methylprednisolone.
- This case represents the first reported instance of AGEP specifically caused by methylprednisolone.
- Delayed-type hypersensitivity reactions to corticosteroids, particularly Group A, are uncommon but significant.
Implications:
- This case underscores the potential for rare but serious adverse reactions to systemically administered corticosteroids.
- Accurate diagnosis of AGEP requires clinical, histological, and microbiological evaluation.
- Epicutaneous testing is crucial for identifying specific corticosteroid allergies, especially in delayed-type reactions, guiding future treatment choices.