Fig. 1.

Male, 18 years, kyphoscoliosis associated with Chiari I malformation and cervical syringomyelia. a Preoperative clinical feature. b Preoperative radiographs showed severe and rigid curves on coronal plane. c The cerebellar tonsils herniation with huge cervical syringomyelia formation. d Posterior vertebral column resection (PVCR) of T11 was performed; in the process of deformity correction, the spinal cord was unexpectedly and suddenly angled and twisted. e–f 24-month follow-up outlook radiograph. g 24-month follow-up MRI shows that the huge cervical syringomyelia had been narrowed following the spinal deformity correction