Many reasons may lead to the baby's congenital malformation, such as radiation, drugs, spoiled food, viral and bacterial infections, and there are many unpredictable reasons, or no reasons at all!

Ear deformities are caused by heredity or gene mutation. Right ear deformity, if only external ear deformity, can be corrected by preschool surgery. If accompanied by middle ear malformation, it is necessary to determine whether there is any abnormality in middle ear anatomy according to CT examination. If hearing is possible, surgery should be performed as soon as possible after one year old to gain hearing.