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Clinical Fellow, Department of Medical Oncology, Hacettepe University Institute of Oncology, Ankara, Turkey
Assistant, Department of Internal Medicine, Hacettepe University Institute Faculty of Medicine, Ankara
Assistant, Department of Internal Medicine, Hacettepe University Institute Faculty of Medicine
Assistant, Department of Internal Medicine, Hacettepe University Institute Faculty of Medicine
Assistant, Department of Internal Medicine, Hacettepe University Institute Faculty of Medicine
Clinical Fellow, Department of Medical Oncology, Hacettepe University Institute of Oncology
Associate Professor, Department of Medical Oncology, Hacettepe University Institute of Oncology
Professor, Department of Medical Oncology, Hacettepe University Institute of Oncology
Reprints: Dr. Kilickap, Department of Medical Oncology, Hacettepe University Institute of Oncology, Sihhiye 06100, Ankara, Turkey, fax 90 312 309 2905, skilickap{at}yahoo.com
OBJECTIVE: To report 2 cases of nonconvulsive status epilepticus (NCSE) following infusion of ifosfamide.
CASE SUMMARIES: Two patients who received ifosfamide-containing chemotherapy developed NCSE. One woman received ifosfamide 1000 mg/m2 (1 h infusion on days 15); confusion, lethargy, and speech deterioration developed on day 3. The second patient developed similar symptoms on day 3 of treatment with 2500 mg/m2. Both patients responded to intravenous administration of diazepam 10 mg and were given levetiracetam as maintenance therapy.
DISCUSSION: The severity and presentation of central nervous system toxicity due to ifosfamide varies greatly and involves a spectrum ranging from subclinical electroencephalogram changes to coma. NCSE, an epileptic disorder in which typical convulsive activity is absent, has previously been reported in only 4 patients receiving ifosfamide. Levetiracetam may be used for maintenance antiepileptic therapy after diazepam administration.
CONCLUSIONS: Among the many presentations of ifosfamide neurotoxicity, clinicians should consider NCSE as a possible explanation for changes in consciousness in a patient receiving this agent. An objective causality assessment by use of the Naranjo probability scale revealed that NCSE due to ifosfamide was probable.
Key Words: ifosfamide, levetiracetam, nonconvulsive status epilepticus
Published Online, January 31, 2006. www.theannals.com, DOI 10.1345/aph.1G363