A congenital malformation syndrome characterized by mandibulofacial dysostosis and anterior upper-limb defects, though occasionally, lower-limb defects have also been reported. Intrafamilial variability has been observed along with phenotype variability and severity including shoulder and pelvic girdle hypoplasia, fibular hypoplasia and eleven ribs. The disease is Monarch Disease Ontology identifier MONDO_0800483 (SF3B4-related acrofacial dysostosis).