Microtia usually appears in combination with obstruction (atresia) of the external ear canal, and in about 50% of the cases it appears as a single defect with no other accompanying abnormalities.

Hemifacial microsomia

Goldenhar Syndrome

Treacher Colins Syndrome

  In some cases, microtia can appear in combination with other abnormalities which are not associated with any other syndrome, such as:

Cleft lip and palate

Congenital heart diseases

Eye defects

Small limbs

Abnormalities in the kidneys