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An analysis of epilepsy with chromosomal abnormalities
Hideo Yamanouchi1, George Imataka, Eiji Nakagawa
1Department of Pediatrics and Dokkyo University School of Medicine, 880 Kitakobayashi, Mibu, Shimotsuga, Tochigi 321-0293, Japan. yhideo@dokkyomed.ac.jp
Brain & Development
|July 19, 2005
Summary
Chromosomal abnormalities in neonates are linked to epilepsy. This study found seizures in neonates with trisomy 21, trisomy 18, and other chromosomal anomalies, highlighting the importance of monitoring for neurological complications.
Area of Science:
- Medical Genetics
- Neonatology
- Neurology
Background:
- Neonates admitted to the neonatal intensive care unit (NICU) can present with complex medical conditions.
- Chromosomal abnormalities are a significant cause of congenital anomalies and can be associated with neurological issues.
- Epilepsy in neonates requires thorough investigation, especially when linked to genetic disorders.
Purpose of the Study:
- To investigate the occurrence and characteristics of epilepsy in neonates with diagnosed chromosomal abnormalities.
- To identify specific chromosomal anomalies associated with seizure disorders in the neonatal period.
- To describe the clinical features and neurological findings in neonates with chromosomal abnormalities and epilepsy.
Main Methods:
- Retrospective review of medical records of neonates admitted to the NICU between 1978 and 2001.
- Analysis of patients diagnosed with chromosomal anomalies and epilepsy.
- Detailed examination of seizure types, associated anomalies, and diagnostic findings (EEG, CT).
Main Results:
- Out of 5789 neonates, 128 had chromosomal anomalies. Seizures were observed in five neonates with trisomy 21, and one each with trisomy 18, 6q-, 13q-, 21q-, and mosaic trisomy 13.
- Specific cases highlighted include Wolf-Hirschhorn syndrome (4p-) with intractable epilepsy and agenesis of the corpus callosum, and a case of 13q- deletion presenting with infantile spasms.
- A neonate with mosaic trisomy 8q showed unique intractable epilepsy with vomiting, staring, and astatic seizures, accompanied by bilateral globus pallidus calcification and EEG abnormalities.
Conclusions:
- Chromosomal abnormalities are associated with a significant risk of epilepsy in neonates.
- Specific chromosomal anomalies, such as trisomy 21 and various deletions/mosaicisms, demonstrate a clear link to seizure disorders.
- Early identification and comprehensive management of neurological complications are crucial for neonates with chromosomal abnormalities.