Patau syndrome, also known as trisomy 13, is a rare genetic disorder caused by the presence of an extra copy of chromosome 13. It often results in miscarriage, stillbirth, or death in the first year of life. Babies born with Patau syndrome experience slow growth and development with low birth weight. They typically have several serious medical problems affecting the brain, heart, kidneys and other organs. While there is no cure, treatment aims to address symptoms through surgery, feeding tubes, and therapies. Most children with Patau syndrome do not survive past one year of age.