A baby boy presents with Treacher Collins syndrome.A medical geneticist evaluates the boy and meets with both parents.She notices that the mother has mild Treacher Collins-like features.Which pharyngeal arch derivatives are most dramatically affected in this syndrome?

Question

Quizplus · Accepted Answer

Treacher Collins syndrome primarily affects the derivatives of the first pharyngeal arch, leading to abnormalities in the development of the face, including the cheekbones, jaw, and external ears.

A Baby Boy Presents with Treacher Collins Syndrome