Sacrococcygeal teratoma with spinal canal invasion prenatally diagnosed

Fetal sacrococcygeal teratoma (SCT) is rarely associated with spinal invasion. The prognostic significance of spinal invasion is unknown. In the past, invasion has been discovered by postnatal imaging or in the operating room. As screening ultrasounds have become more prevalent in the United States, more SCTs have been discovered and characterized prenatally. This screening has allowed for better birth planning and neonatal therapy. We report a case of SCT invading the spinal canal seen on prenatal ultrasound. To our knowledge, this is the first documented case of prenatally diagnosed SCT intraspinal invasion.