KnowraApert syndromeLinked fromLinked fromThe 4 pages that link to Apert syndrome, each with the reason it gives.All 4Related 2Compared with 2SyndactylyRelated: Its complex syndactyly is a defining limb feature.CraniosynostosisRelated: Its combination of skull and limb findings helps distinguish syndromic craniosynostosis.Crouzon syndromeCompared with: Unlike Crouzon syndrome, it characteristically includes syndactyly.Pfeiffer syndromeCompared with: Both can involve FGFR2, but extensive syndactyly is more characteristic of Apert syndrome.