What changed
Doctors in Shenzhen used ultrasound-guided microwave ablation to shrink a severe lung lesion in an unborn baby without making an incision. The lesion, a roughly 5-centimetre case of congenital pulmonary airway malformation (CPAM), was treated at 22 weeks after compressing the baby’s heart and lungs and causing abdominal fluid build-up.
A thin needle passed through the mother’s abdomen and uterus delivered microwave heat into the tumour for about two minutes. Within three days, the lesion had shrunk and the fluid had disappeared; the baby was delivered by Caesarean section at 37 weeks, weighed about 2.9 kg and remained symptom-free at four months.
Why it matters
CPAM is estimated to affect roughly one in 25,000 to 35,000 pregnancies. Most cases can be managed, but this one presented a particularly difficult problem: the growth consisted of tiny cysts and lacked a central blood vessel suitable for targeting with more conventional treatment.
That makes the procedure’s design its most important detail. Doctors used real-time, high-resolution ultrasound to place the needle precisely, then monitored the heating closely so nearby organs were not damaged. The result was a way to reduce pressure on the baby’s chest while the pregnancy continued.
The case was published on August 20, 2026, in Ultrasound in Obstetrics & Gynaecology. It is a promising proof of possibility, not yet a treatment standard. Long-term safety, developmental effects and whether other teams can reproduce the result remain unknown.
Comments
No comments yet.