Overview: NGS Brain Malformations Sequencing TestIntroduction: The NGS Brain Malformations Sequencing Test sequences genes to diagnose brain malformations, causing seizures or developmental issues. Aligned with 2023 AAN guidelines, it uses PCR for high specificity, supporting neurological screening. This test is critical for guiding diagnosis, treatment planning, and improving outcomes in molecular pathology for patients with suspected brain malformations.
Other Names: Brain Malformations NGS Assay, Brain Malformation Gene Panel.
FDA Status: Laboratory-developed test (LDT), meeting molecular pathology standards for diagnostic accuracy.
Historical Milestone: Brain malformation sequencing began in the 2000s with neurodevelopmental research. NGS methods improved in the 2010s, enhancing diagnostic precision.
Purpose: Sequences genes to diagnose brain malformations, guides treatment, and evaluates patients with seizures or developmental issues.
Test Parameters: 1. Brain Malformation Genes
Pretest Condition: No fasting required. Collect whole blood, buccal swab, or saliva. Report history of seizures, developmental issues, or brain malformation symptoms.
Specimen: Whole Blood (EDTA, 2-5 mL), Buccal Swab (sterile swab, 1-2 swabs), Saliva (sterile container, 1-2 mL). Transport in a biohazard container.
Sample Stability at Room Temperature: 24 hours
Sample Stability at Refrigeration: 48 hours
Sample Stability at Frozen: Not frozen
Medical History: Document seizures, developmental delays, microcephaly, or family history of brain malformations. Include current medications, especially anticonvulsants.
Consent: Written consent required, detailing the tests purpose, brain malformation implications, and risks of sample collection.
Procedural Considerations: Uses next-generation sequencing to analyze brain malformation genes (e.g., DCX, LIS1). Results are available in 3-5 days, supporting clinical decisions. Performed in laboratories, often for brain malformation diagnosis.
Factors Affecting Result Accuracy: Low DNA yield or improper sample storage can affect results. Contamination may reduce specificity.
Clinical Significance: Identified mutations confirm brain malformations, guiding surgical intervention or genetic counseling. Negative results may require brain imaging.
Specialist Consultation: Consult a neurologist or geneticist for result interpretation and treatment planning.
Additional Supporting Tests: Brain MRI, EEG, or developmental assessment to confirm brain malformation diagnosis.
Test Limitations: Not all brain malformations are genetic; clinical correlation is needed. Sample quality affects sensitivity.
References: AAN Brain Malformation Guidelines, 2023; Neurology, Barkovich AJ, 2022.
