hereditary

Destroying blood vessels leading to a large SCT.

Sacrococcygeal teratoma (SCT) and twin:twin reverse arterial perfusion (TRAP) sequence.

Tumors at the base of the tailbone. The most common tumor in newborns, occurring in 1 out of every 35,000-40,000 births, some prenatal SCTs are very large and can stress the heart.

Urinary tract obstructions (males); diaphragmatic hernia and cystic adenomatoid malformation; sacrococcygeal teratoma; twin-twin transfusion syndrome; twin:twin reverse arterial perfusion.