FGF1 and Hartsfield-Bixler-Demyer syndrome: Hartsfield-Bixler-Demyer Syndrome, also known as fibroblast growth factor 1 (FGFR1)-related Hartsfield Syndrome, is a rare genetic disorder characterized by a combination of holoprosencephaly and ectrodactyly spectrum disorder, as well as facial anomalies including cleft lip and palate [1].