Abstract
We report a 60 -year-old female with fibrous dysplasia of the twelfth thoracic spine. She presented middle back pain and anterior chest numbness of the T12 dermatome region. X-ray views showed sclerotic changes in the left pedicle of the T12 vertebra. Computerized axial tomogram demonstrated calcification spots within the radiolucent area accompanied by perifocal sclerotic bony changes in the left pedicle of the T12 vertebra. Bone scintigram showed increased uptake in the left pedicle of the T12 vertebra. Based on radiographic evaluation, chondrosarcoma was diagnosed and she underwent total en bloc spondylectomy of T12. Histopathologic diagnosis of the resected specimen was fibrous dysplasia.Because monostotic fibrous dysplasia of the thoracic spine is rare, it is difficult to establish a diagnosis by radiographic evaluation alone. We radiographically misdiagnosed the lesion. We recommend interoperative or preoperative histological exploration before or during surgery.
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