Pendred syndrome, also known as deaf-goiter syndrome, is characterized by goiter with congenital deafness and is an autosomal recessive disorder. The main manifestation of the disease is congenital deafness, which is diagnosed by chromosomal testing when goiter develops in childhood or adolescence. Once diagnosed, in the case of congenital deafness, hearing can be improved with a cochlear implant device. In the case of goiter, it is controlled by medication based on the results of thyroid hormone levels. This is a congenital chromosomal abnormality, so there is no cure for it, and there is a certain chance that it will be inherited by the offspring, so it is important to make a good prenatal diagnosis for the sake of eugenics.