<prompt> Which of the following is a feature of Treacher Collins syndrome ?Hypoplasia of frontal boneColoboma of eyelidLow arched palateAll of the above  <response>: Coloboma of eyelid is one of the ocular feature of Treacher Collins syndrome Mandibulofacial dysostosis aka Treacher Collins syndrome Refers to a condition resulting from hypoplasia of zygoma and mandible. Features of Treacher Collins syndrome : Indistinct inferior orbital margin Coloboma of the lower eyelid Anti-mongoloid slant Macrostomia with high-arched palate External ear deformity Bird-like face. 