Scientists at Great Ormond Street Children’s Hospital in London have reported a new advance for tissue engineered grafts in a lab-grown esophagus that has sufficient muscle regeneration to coordinate peristalsis, enabling the recipient to swallow. The aim is to generate grafts that can be used to treat babies born with the rare congenital condition esophageal atresia, in which the esophagus fails to connect to the stomach, usually forming a close pouch instead.