Multilevel thoracic pedicle aplasia causing congenital thoracic kyphosis: case report.

OBJECTIVE AND IMPORTANCE: Congenital thoracic kyphosis is a rare cause of treatable myelopathy. Multilevel thoracic pedicle aplasia as a cause of this deformity has not been previously reported in the literature. We report a case and describe the surgical management and outcome. CLINICAL PRESENTATION: A 14-year-old boy presented to us with a 4-month history of back pain and slowly progressive spastic paraparesis, Radiographic studies revealed thoracic kyphosis and bilateral aplasia of the pedicles of T4-T8. INTERVENTION: The patient underwent surgical treatment via a posterior approach for decompression of T4-T8, followed by arthrodesis from T2 to T12, using a hook claw construct with multiple points of fixation and autologous bone grafting. CONCLUSION: Congenital vertebral anomalies may be clinically occult, and delayed presentation may occur in adolescence or adulthood. Aplasia of multiple thoracic pedicles can produce kyphotic deformities with neurological compromise. A posterior approach with multiple points of segmental instrumentation can be effective in treating kyphotic deformities that are flexible and of moderate severity (<75 degrees).