Related Experiment Video
Updated: May 12, 2026

Electromagnetic Source Imaging in Presurgical Evaluation of Children with Drug-Resistant Epilepsy
Published on: September 20, 2024
Partial epilepsy and developmental delay in infant with ring chromosome 14
Insights
Ring chromosome 14 (r14) causes early-onset epilepsy and developmental delays. Chromosomal analysis is crucial for diagnosing r14 in infants with unexplained seizures and developmental issues.
Area of Science:
- Genetics
- Neurology
- Pediatrics
Background:
- Ring chromosome 14 (r14) syndrome is a rare chromosomal disorder.
- It is associated with a distinct set of clinical features including early-onset epilepsy and developmental abnormalities.
Observation:
- A case of a female infant presenting with partial seizures and delayed development is described.
- The patient experienced afebrile generalized convulsions at 9 months, later evolving into complex partial seizures.
Findings:
- Karyotyping revealed the diagnosis of 46, XX, r(14) (p11.2q32.3).
- Despite the absence of consistent neuroimaging or EEG findings, clinical presentation and facial dysmorphisms aided diagnosis.
- Epilepsy in this patient was refractory to initial treatment, requiring adjustments in medication.
Implications:
- The study highlights the importance of chromosomal analysis in infants with unexplained refractory epilepsy and developmental delay.
- Early diagnosis of ring chromosome 14 syndrome can facilitate timely management and genetic counseling.
- Pediatric neurologists should consider chromosomal abnormalities when faced with complex neurological presentations in infancy.
Abstract:
Ring chromosome 14 (r14) is clinically characterized by early-onset epilepsy, mental retardation, delayed speech, microcephaly, extremely mild facial dysmorphisms and ophthalmologic abnormalities. We report a case presenting with partial seizures and delayed development in infancy in which r14 was diagnosed based on chromosomal analysis. The patient was a girl with a normal family and delivery history. Afebrile generalized convulsions developed at age 9 months, and phenobarbital was started, but was changed to zonisamide due to impaired liver function. Chromosome analysis led to a diagnosis of 46, XX, r(14) (p11.2q32.3). At age 5 years, while under treatment with zonisamide and clobazam, epilepsy was characterized by multiple daily episodes of complex partial seizures. Although there are no consistent brain MRI or electroencephalogram findings, experienced pediatric neurologists can make a diagnosis based on facial dysmorphisms. When refractory epilepsy is encountered in infancy with developmental delay of unknown cause, chromosome analysis should be performed.
More Related Videos
08:22A Novel Strategy Combining Array-CGH, Whole-exome Sequencing and In Utero Electroporation in Rodents to Identify Causative Genes for Brain Malformations
Published on: December 1, 2017
10:22Interictal High Frequency Oscillations Detected with Simultaneous Magnetoencephalography and Electroencephalography as Biomarker of Pediatric Epilepsy
Published on: December 6, 2016
Related Concept Videos
Epilepsy ll: Types
Epilepsy and Seizures: Overview
Various factors can trigger epilepsy, including genetic factors, brain damage, metabolic causes, and unknown etiology. Diagnosis of epilepsy involves electroencephalography (EEG), which...
Seizures: Classification
Seizures are typically classified into two main categories: focal and generalized seizures.
Focal Seizures
Focal seizures originate from specific regions of the brain. These seizures are further sub-classified into two types:
Seizures l: Introduction