Doctors at Beilinson Hospital in Petach Tikvah have carried out a first-of-its-kind fetal operation in Israel, intervening inside the uterus to stop a rare tumor on the placenta that had pushed an unborn baby into heart failure.

The mother was only 25 weeks pregnant when a routine anatomy scan revealed the tumor. Further ultrasound testing showed it was not a passive finding: it was changing blood flow between the placenta and the baby, straining the fetal heart and turning the pregnancy into an emergency. At that stage, delivery would have meant extreme prematurity. The team had to try to treat the problem while the baby was still in the womb.

The operation was led by Dr. Yuval Gielchinsky, director of Beilinson’s Fetal Medicine Center, together with Dr. Kinneret Tenenbaum, who heads the hospital’s Twin Pregnancy Clinic. Using an endoscopic approach, the doctors entered the uterus, identified the blood vessels feeding the tumor and cauterized them, cutting the growth off from its blood supply. “The only option left was endoscopic intervention,” Gielchinsky said, noting that such a procedure is possible only when the tumor sits in a reachable location on the placenta.

Placental tumors can sometimes grow slowly and cause no immediate damage. In severe cases, they can become life-threatening: draining fetal circulation, triggering heart failure, anemia, low platelets, dangerous excess amniotic fluid and even preeclampsia in the mother. That is what made this case so urgent. The doctors were not simply treating a mass; they were trying to stop a dangerous vascular system from overwhelming the baby’s heart before birth.

The mother was monitored in the maternal-fetal medicine unit after the procedure and has since been discharged home, with continued follow-up at Beilinson. For Israel’s medical world, the case marks another jump in the fast-moving field of fetal medicine: treating the patient before birth, inside the place where survival still depends on every heartbeat holding steady.