Rapid Trio Whole Exome Sequencing Case Study

This document is a patient case study detailing the application of Rapid Trio Whole Exome Sequencing (rWES) in a neonatal intensive care unit setting. The case involves a 2-week-old infant presenting with multiple severe symptoms, including seizures and respiratory failure. Genetic testing was initiated due to concerns regarding potential somatic mosaic overgrowth conditions. The rWES results revealed a dual diagnosis: a pathogenic variant in the NPRL3 gene linked to familial focal epilepsy and a de novo diagnosis of Trisomy 21, confirmed through Chromosomal Microarray Analysis. The identification of these conditions is significant for medical management, allowing for targeted treatments for the epilepsy and informing family members about genetic risks. The case illustrates the importance of comprehensive genetic testing in diagnosing complex conditions and highlights the role of rWES in expediting the diagnostic process, thereby preventing a prolonged diagnostic odyssey for the patient and family.