Sacrococcygeal teratoma differential diagnosis

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Overview
Sacrococcygeal teratoma (SCT) is a teratoma (a kind of tumor) located at the base of the coccyx (tailbone). It is thought to be a derivative of the primitive streak.

Differential diagnosis
Other tumors can occur in the sacrococcygeal and/or presacral regions and hence must be ruled out to obtain a differential diagnosis. These include extraspinal ependymoma, neuroblastoma and rhabdomyosarcoma. Smaller SCTs with an external component, seen in prenatal ultrasounds or at birth, often are mistaken for spina bifida.