Cassian Joubert entered the world in an unconventional way this year, undergoing a surgical procedure so unusual that his parents are now planning two birthday celebrations: one for the surgery that saved his life, and one for his actual birth.
The Florida infant was partially delivered at 25 weeks gestation for a groundbreaking prenatal operation, then surgically replaced in his mother's womb to continue developing until term. Doctors at Orlando Health's Winnie Palmer Hospital performed the rare intervention after discovering the baby had congenital high airway obstruction syndrome, or CHAOS, a life-threatening condition affecting roughly one in 50,000 births.
The condition involves a thick membrane blocking the fetus's airway, causing fluid to accumulate in the lungs. For Cassian's mother Keishera Joubert, the diagnosis at 19 weeks of pregnancy felt catastrophic. She learned the condition is often fatal. "Devastatingly fatal" was a phrase she kept encountering in her research.
"We were very joyful" about the pregnancy initially, Keishera told Florida news outlet Wesh 2 News. The couple already had a two-year-old son, Mattias, and were excited about becoming a family of four. That joy turned to fear when ultrasounds revealed the blockage.
Keishera's physician, Dr. Emanuel "Mike" Vlastos, had encountered CHAOS in his 42-year career only a dozen times. Of those cases, just three babies survived. He initially attempted an in-utero laser surgery to clear the blockage, but the procedure failed.
Vlastos proposed an extraordinary alternative. He would perform a cesarean section but only partially deliver the baby. Cassian's head and arms would emerge from the womb while the rest of his body remained inside, still connected to the placenta. An ear, nose and throat specialist would then surgically create an airway, after which the surgical team would place the infant back inside Keishera's uterus for her to carry to term.
In June 2025, at 25 weeks pregnant, Keishera underwent the elaborate procedure at Winnie Palmer. During surgery, the team showed her a photograph of her son. "It was a glimpse of a little baby boy that I would eventually take home from the hospital," Keishera recalled during an appearance on Good Morning America.
Six weeks later, in August, Keishera went into labor. Cassian was delivered through another specialized procedure designed to provide immediate life-saving support. The newborn weighed just 3 pounds.
What followed was a lengthy stay in the hospital's neonatal intensive care unit. Greg Joubert, the baby's father, marveled at his son's resilience during "the beginning of a long journey of his survival." After 139 days in the NICU, Cassian finally went home with his family in time for Christmas.
The boy still requires a ventilator to breathe and faces additional procedures to address the membrane blocking his airway. But his homecoming represented a triumph for the medical team and his parents, who had endured months of uncertainty.
"Him coming home is the magnum opus of this whole situation," Keishera told Orlando Health. "Thank you doesn't even come close to showing our appreciation to the dozens of people involved in our case."
Vlastos plans to present Cassian's case at an international medical conference in Japan in October. In video footage released by Orlando Health, he can be seen holding the infant and reflecting on the journey. "The biggest moment in time was watching the Jouberts take Cassian out of the hospital and go home," he said. "Is there a better day?"
Author James Rodriguez: "This is the kind of story that reminds you why cutting-edge medicine matters and why doctors willing to take calculated risks can change lives."
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