USMLE Forum - Largest USMLE Community

Child with physical features include downward slanting eyes, micrognathia (a small lower jaw), conductive hearing loss, underdeveloped zygoma, drooping part of the lateral lower eyelids, and malformed or absent ears.

Features are due to what defect ?

Treacher-Collins?

A defect in which pharyngeal arch

That would be the first pharyngeal arch