Fig. 2

Radiographic data after conservative therapy for 6 months: a T1WI showing expansive hypointense signal changes (red arrow) in the L1 and L2 vertebral bodies. b T2WI demonstrating hypointense signal changes (red arrow) at the end plates of L1 and L2, with intervertebral disk involvement. c, d Enhanced signal changes in almost the entire L1 and L2 vertebral bodies on enhancing T1WI and T2WI. e CT scan showing osteolytic lesion (red arrow) with surrounding sclerotic bone (yellow arrow) in the vertebral body without expansion to the vertebral pedicle or laminae. f Histological examination result showing fragments of bone (red arrow) and fibrous connective tissues with focal necrosis (yellow arrow) (hematoxylin and eosin staining; × 20 magnification)