Overview: NGS Dementia Panel Sequencing TestIntroduction: The NGS Dementia Panel Sequencing Test sequences dementia-related genes to diagnose dementia, causing memory loss or confusion. Following 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 dementia.
Other Names: Dementia NGS Assay, Dementia Gene Panel.
FDA Status: Laboratory-developed test (LDT), meeting molecular pathology standards for diagnostic accuracy.
Historical Milestone: Dementia sequencing began in the 2000s with neurodegenerative research. NGS methods improved in the 2010s, enhancing diagnostic precision.
Purpose: Sequences dementia-related genes to diagnose dementia, guides treatment, and evaluates patients with memory loss or confusion.
Test Parameters: 1. Dementia Genes
Pretest Condition: No fasting required. Collect whole blood, buccal swab, or saliva. Report history of memory loss, confusion, or dementia 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 memory loss, confusion, behavioral changes, or family history of dementia. Include current medications, especially cognitive enhancers.
Consent: Written consent required, detailing the tests purpose, dementia implications, and risks of sample collection.
Procedural Considerations: Uses next-generation sequencing to analyze dementia genes (e.g., APP, PSEN1). Results are available in 3-5 days, supporting clinical decisions. Performed in laboratories, often for dementia diagnosis.
Factors Affecting Result Accuracy: Low DNA yield or improper sample storage can affect results. Contamination may reduce specificity.
Clinical Significance: Identified mutations confirm dementia, guiding supportive care or genetic counseling. Negative results may require cognitive testing.
Specialist Consultation: Consult a neurologist or geneticist for result interpretation and treatment planning.
Additional Supporting Tests: Cognitive testing, brain MRI, or CSF analysis to confirm dementia diagnosis.
Test Limitations: Not all dementia cases are genetic; clinical correlation is needed. Sample quality affects sensitivity.
References: AAN Dementia Guidelines, 2023; Neurology, McKhann GM, 2022.
