Ultrasound-guided radiofrequency ablation combined with puncture and aspiration for intrauterine treatment of fetal sacrococcygeal cystic solid teratoma: a case report and literature review

Abstract Objectives To explore the value of ultrasound-guided radiofrequency ablation combined with puncture and aspiration in the intrauterine treatment of fetal sacrococcygeal cystic and solid teratoma. Case presentation A 27-year-old pregnant woman was diagnosed with a cystic and solid tumor in the fetal sacrococcygeal region at 25 weeks of gestation. As the tumor grew, our clinical team creatively performed ultrasound-guided radiofrequency ablation combined with puncture and aspiration at 28 weeks of gestation, followed by puncture and aspiration only at 32 weeks of gestation, to reduce the tumor volume and control its growth rate. The fetus grew safely to term and underwent surgical excision of the tumor after 7 days of birth with a favorable prognosis. Conclusions Ultrasound-guided radiofrequency ablation combined with puncture and aspiration is a safe and effective method for the treatment of fetal sacrococcygeal cystic-solid teratoma.