Prenatal or neonatal sacrococcygeal mass, suspected sacrococcygeal teratoma
Recommended: Prenatal US + Fetal MRI + Postnatal MRI Pelvis is the preferred imaging study for prenatal or neonatal sacrococcygeal mass, suspected sacrococcygeal teratoma. Most common neonatal tumor.
Recommended study
Prenatal US + Fetal MRI + Postnatal MRI Pelvis
Most common neonatal tumor. Altman classification (I-IV) by intrapelvic vs external extent.
If the default doesn't apply
Surveillance for recurrence post-resection
MRI
MRI pelvis + AFP
IV contrast
Watch-outs
Fetal hydrops
Large vascular tumors cause high-output cardiac failure → fetal hydrops.
Coccyx must be removed
Recurrence risk if coccyx retained at primary resection.
Pearls
- AFP is elevated and useful tumor marker for surveillance.
- Yolk sac tumor recurrence in adolescents if incompletely resected.
- Resection within first week of life.