Neuropediatrics 2006; 37(5): 305-307
DOI: 10.1055/s-2006-955966
Short Communications

Georg Thieme Verlag KG Stuttgart · New York

Generalized Convulsions with Diffuse Spike and Wave Bursts Emerging with Graves' Disease

T. Maeda1 , T. Izumi1
  • 1Division of Pediatrics and Child Neurology, Department of Brain and Nerve Science, Oita University Faculty of Medicine, Oita, Japan
Further Information

Publication History

Received: May 16, 2006

Accepted after Revision: December 5, 2006

Publication Date:
18 January 2007 (online)

Abstract

Thyroid hormone lowers the seizure threshold. We present the case of a female patient who developed generalized convulsions emerging with Graves' disease, and clarified the clinico-electroencephalographic characteristics. Before treatment, electroencephalography (EEG) showed 2- to 2.5-Hz diffuse spike and wave (SW) bursts, apparent during and after hyperventilation without any distinct absence seizure. Thiamazole treatment without any anticonvulsant led to a euthyroid state, convulsions resolved and EEG abnormalities normalized promptly. Clinical seizures were generalized tonic-clonic convulsions during sleep, and EEG showed diffuse SW bursts induced by hyperventilation. These characteristics suggested that epilepsy might correspond to idiopathic generalized epilepsy (IGE). IGE might be susceptible to hyperthyroidism. Cases of IGE emerging with hyperthyroidism, even if EEG paroxysms are advanced, may be improved using antithyroid pharmacotherapy alone.

References

MD Tomoki Maeda

Department of Brain and Nerve Science Pediatrics
Oita University Faculty of Medicine

1-1 Idaigaoka, Hasama, Yufushi

Oita-ken 879-5593

Japan

Email: [email protected]