FOXP1 and hypoplastic left heart syndrome: Until now, the HLHS had only been described in a 3p chromosome deletion in association with the FOXP1 gene on band 3p13.8 Based on this bioinformatic analysis and literature investigation, we could not find a gene in the 3p26 region correlated with HLHS, which suggests some microdeletion in another region of the patient genome, not evident in the karyotype analysis.