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COVID-19 Advisory: Help slow down the spread of the virus. If you have symptoms, call before going to a clinic or emergency department. We are restricting visitation to one primary caregiver per patient at all Phoenix Children’s locations. No visitors. For the latest updates on COVID-19 visit the Maricopa County Department of Public Health or the CDC.

Conditions We Treat

Down Syndrome Clinic

Down syndrome most often occurs when a person has an extra copy of chromosome 21 (trisomy 21). One in every 691 babies in the U.S. is born with Down syndrome. In Arizona, 161 babies are born with Down syndrome every year. Children with Down syndrome have an increased risk for certain medical conditions, like congenital heart defects, respiratory and hearing problems, childhood leukemia and thyroid conditions.

How is Down syndrome diagnosed?

Down syndrome is usually identified at birth or shortly after. At first, the diagnosis is based on physical characteristics that are common in babies with Down syndrome. But a diagnosis must be confirmed by a chromosome study called a karyotype. Children with Down syndrome experience cognitive delays, but the effect is usually mild to moderate.

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