부산대학교 도서관

We report the clinical course and results of electroencephalographic (EEG) examinations in 2 sisters with infantile dentatorubral pallidoluysian atrophy (DRPLA).Typical development was seen until the age of 6 months. From that age, however, development was delayed. The elder sister experienced astatic seizure at the age of 3 years. She began to deteriorate and had difficulty in controlling her body movement at the age of 3 years and 7 months.Magnetic resonance imaging revealed marked cerebellar atrophy and genetic analysis of the DRPLA gene led to a diagnosis of DRPLA. Repeat size of the CAG base sequence was 86/19. Neurological deterioration was rapid and controlling convulsions using antiepileptic drugs was difficult. EEG was characterized by high-voltage slow waves and poor development of basic wave through the follow-up period.In contrast, the younger sister showed only mild developmental delay, and could stand independently at the 2 years and 9 months. Repeat size of the CAG base sequence was 79/11. Myoclonic seizures developed at 4 years and 7 months, but have been well controlled using sodium valproate. EEG showed diffuse 3-4 Hz spike-and-wave complexes that were rather different from the findings in her elder sister.In conclusion, these case reports of sisters with DRPLA showing different clinical courses and EEG findings suggested that EEG may be useful to clarify the clinical prognosis of infantile-onset DRPLA.