All of the following are featured of Treacher Collins syndrome, except

Treacher Collins syndrome or mandibulofacial dysostosis is a group of closely related defects of the head and face, characterised by Antimongoloid palpebral fissures with a coloboma of the outer portion of the lower eyelid Hypoplasia of the malar bones and mandible Malformation of the external ear Macrostomia, high palate and malocclusion of teeth Blind fistulas between angles of ears and angles of the mouth