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Agranulocytosis following phenytoin-induced hypersensitivity syndrome

Susumu Ito1, Mutsuki Shioda, Kaori Sasaki

  • 1Department of Pediatrics, School of Medicine, Tokyo Women's Medical University, 8-1 Kawada-cho, Shinjuku-ku, Tokyo, Japan. susumu.ito@nifty.com

Brain & Development
|September 9, 2008
PubMed

Insights

Phenytoin can cause antiepileptic drug hypersensitivity syndrome (AHS). A rare case showed AHS progressing to agranulocytosis, a serious condition requiring prompt medical intervention.

Area of Science:

  • Pharmacology
  • Immunology
  • Hematology

Background:

  • Phenytoin is a widely used antiepileptic medication.
  • Antiepileptic drug hypersensitivity syndrome (AHS) is a rare but severe complication associated with phenytoin use.

Observation:

  • A 5-year-old boy experienced typical AHS symptoms including fever, rash, lymphadenopathy, and hepatitis after phenytoin treatment.
  • Following recovery from initial AHS symptoms, the patient unexpectedly developed agranulocytosis with fever.

Findings:

  • The patient's AHS presentation lacked eosinophilia and lymphocytosis.
  • Successful treatment involved high-dose steroids for AHS and a combination of immunoglobulin, granulocyte colony-stimulating factor, and cefepime for agranulocytosis.

Implications:

  • This case highlights a potential, severe progression from AHS to agranulocytosis.
  • Recognizing this unexpected complication is crucial for managing phenytoin-induced adverse reactions and preventing life-threatening outcomes.

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