1. It gives attachment to the anterior sacrococcygeal ligament and the fifth sacral nerve. 2. These sacrococcygeal teratomas are often relatively amenable to treatment. 3. They were characterized by elongated distal thoracic vertebrae, lumbar, and proximal sacrococcygeal . 4. Sacrococcygeal teratoma alone is diagnosed at birth in one out of 40, 000 humans.5. In particular, a pilonidal cyst in the gluteal cleft can resemble a sacrococcygeal teratoma. 6. This short ligament forms the continuation of the anterior longitudinal ligament and stretches over the sacrococcygeal symphysis. 7. The most notable of these is sacrococcygeal teratoma, the single most common tumor diagnosed in babies at birth. 8. It is known also as the base or root of the tail, and corresponds to the human sacrococcygeal symphysis. 9. In neonates, infants, and children younger than 4 years, the majority of germ cell tumors are sacrococcygeal teratomas. 10. Historically, sacrococcygeal teratomas present in 2 clinical patterns related to the child s age, tumor location, and likelihood of tumor malignancy.