Subcutaneous sacrococcygeal ependymoma in a child.

A nine-year-old girl presented with a sacral mass. The mass had been present since the first year of life and gradually increased in size. Physical examination revealed a palpable soft tissue mass at the midline over the sacrococcygeal region. Neurologic examination was unremarkable. The magnetic resonance imaging showed a well-defined, lobulated nonlipomatous mass with T1 and T2 prolongation (Fig. 1, Left, Middle). The overlying subcutaneous fat was intact and