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Cleveland Clinic performs surgery on 26-week-old fetus to remove rare heart tumor: Mom and baby doing well

The baby boy was born 10 weeks after the heart surgery.
Credit: Cleveland Clinic
The Cleveland Clinic says mom and baby are doing well after doctors successfully performed surgery to remove a tumor when the fetus was 26 weeks old.

CLEVELAND — The Cleveland Clinic is sharing news of a procedure that was done in May as surgeons successfully removed a malignant tumor from the heart of a 26-week-old fetus, which was impairing circulation and leading to fluid accumulation around the heart and other organs.

Clinic officials said few studies about the rare condition – known as an intrapericardial teratoma with fetal hydrops evolving to fetal heart failure – have been reported in medical journals.

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“Only one previous incidence of continued pregnancy and delivery after fetal intrapericardial teratoma resection is documented in the world’s medical literature,” said Darrell Cass, M.D., director of Cleveland Clinic’s Fetal Surgery and Fetal Care Center. “As far as we know, Cleveland Clinic is the second academic medical center in the world to have performed this fetal surgery successfully with continued pregnancy and delivery.”

Clinic officials said the mother and fetus recovered with no complications and no sign of tumor recurrence during prenatal exams. Then, on July 13, the baby boy was delivered near full term by Cesarean section at 36 weeks and two days.

Both mom and baby are doing well.

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“I am very proud of our talented congenital heart surgery and fetal surgery teams that integrated seamlessly to successfully perform a complex lifesaving fetal surgery,” Dr. Cass said. “This tumor was growing rapidly in the exact wrong spot. It was compressing the heart of the fetus, causing fluid accumulation, and we started seeing signs that the cardiac function was deteriorating. We needed to act quickly and decisively to rescue the fetus.”

Moving forward, Clinic officials said the infant’s healthcare team will monitor his heart health and check that there are no signs of tumor recurrence. In the future, the child will likely need surgery to reposition together his sternum that did not properly heal in utero.

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“In this case, time was of the essence,” Dr. Cass said. “Shortly after the patient arrived at Cleveland Clinic, imaging tests showed that the tumor kept growing and the fetus’s heart function was deteriorating. It is important to acknowledge the whole care team. This family’s maternal fetal medicine specialist accurately diagnosed the condition and reached out to us because of our expertise in fetal care and treatment.”

So how did they do it? Here’s how the Cleveland Clinic explained the process behind the operation…

To perform this fetal surgery, Dr. Cass led a team that included pediatric and congenital heart surgeons Hani Najm, M.D., and Alistair Phillips, M.D.; pediatric cardiologist Francine Erenberg, M.D.; obstetric and pediatric anesthesiologists McCallum Hoyt, M.D., Tara Hata, M.D., Yael Dahan, M.D.; and maternal-fetal medicine specialist, Amanda Kalan, M.D., who provided the mother’s care, including delivery of the newborn baby boy 10 weeks after the fetal surgery.

Credit: Cleveland Clinic
Cleveland Clinic says baby doing well after having surgery as 26-week-old fetus.

Once the mother was anesthetized with an approach to provide the safest environment for the fetal heart surgery to be successful, a Cesarean section-like incision was made to expose the mother’s uterus. Ultrasound was used to carefully locate the placenta and fetus, and best location for entry. The uterus was then opened about 12 cm, and the arms of the fetus were brought out to expose the chest.

Dr. Najm, who led the heart surgery team, inserted an IV line in a blood vessel of the fetus’s right arm to deliver fluids, and medications as needed. Then, he carefully opened the chest and pericardium, which is the membrane enclosing the heart, and removed the tumor from the beating fetal heart. “As soon as the tumor was removed, the compression of the left atrium disappeared, and there was a nice blood flow that was almost back to normal,” said Dr. Najm.

Following the completion of the fetal heart surgery, the chest of the fetus was closed and the fetus was positioned back in the uterus. The uterus was then closed, followed by closure of the mother’s abdomen. The surgery lasted 3 ½ hours.

Both mother and fetus recovered well following the surgery. The fetus’s cardiac function immediately improved, and the fetus stayed in the womb for the remainder of the pregnancy. Ten weeks later, the baby was born.

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