[Ventral stabilization of the lumbar spine of a 2-year-old boy with an expandable cage : 7-year course].

This case report describes the first implantation of an expandable cage into the lumbar spine of a 2-year-old boy. Due to incomplete remission of a teratoma, it was necessary to replace the second lumbar vertebral body with an expandable cage implantation and subsequent dorsoventral stabilization. During the follow-up period with annual x-ray examinations, a loss of correction without increased pain or neurological deficits could be shown in the now 9-year-old boy.