A New Patient With SPOUT1-Related Neurodevelopmental Disorder Identified by Genomic Data Re-Analysis: Novel Phenotypic Features and Literature Review.

We report a 5-year-old Spanish male with a homozygous SPOUT1 variant (NM_016390.4:c.1058C>T; p.Thr353Met), identified by re-analysis of whole-genome sequencing. His phenotype includes severe developmental delay, microcephaly, epilepsy evolving to Lennox-Gastaut-like syndrome, growth impairment, dysmorphic features, and multiple congenital anomalies. Our case expands the SPOUT1-related neurodevelopmental spectrum and underscores the diagnostic value of periodic genomic data re-analysis.