Patau syndrome: Trisomy 13 is a chromosome condition

Trisomy 13 is a chromosome condition that causes severe learning disability and distinctive physical features. It is caused by having an extra copy of chromosome 13 and can be inherited or occur randomly. Patau's syndrome is a rare genetic disorder caused by having an extra copy of chromosome 13. It affects about 1 in 4,000 births and causes severe developmental problems and often death. Learn about the symptoms, causes, screening and treatment options. Trisomy 13, or Patau syndrome, is a genetic disorder that affects the development of a baby. Learn about the symptoms, diagnosis, and treatment options. Patau Syndrome (Trisomy 13) Trisomy 13, or Patau syndrome, is a genetic syndrome caused by the presence of 3 copies of chromosome 13. As the 3rd most common trisomy, Patau syndrome has an incidence of 1 in 10,000 live births and is more common in women. Most cases of Patau syndrome are diagnosed prenatally by maternal screening and ultrasound.