RT Book, Section A1 Bianchi, Diana W. A1 Crombleholme, Timothy M. A1 D'Alton, Mary E. A1 Malone, Fergal D. SR Print(0) ID 1106401105 T1 Sacrococcygeal Teratoma T2 Fetology: Diagnosis and Management of the Fetal Patient, 2e YR 2015 FD 2015 PB McGraw-Hill Education PP New York, NY SN 978-0-07-144201-5 LK obgyn.mhmedical.com/content.aspx?aid=1106401105 RD 2024/10/14 AB Key PointsSacrococcygeal teratomas (SCTs) arise from a totipotent stem cell in Henson’s node.Most SCTs are large, complex, solid, and cystic masses but may have intrapelvic or intra-abdominal extension.Ultrasound alone will make the diagnosis, but fetal MRI will help define anatomic relations, and echocardiographs will evaluate high-output state.SCTs that are >10 cm, solid, highly vascular, or rapidly growing are at highest riskfor hydrops.Fetal surgery may be an option in cases that develop early signs of hydrops.Cesarean section is usually indicated for large SCTs due to risk of rupture and exsanguination.SCTs are usually benign but can have immature elements or rests of malignant yolk sac tumor.Close serial follow-up for at least 3 months for tumor recurrence is indicated with serial α-fetoprotein levels, physical exam, and imaging studies.