A 35 yr old lady with chronic backache. On X ray she had a D12 collapse. But Inter vertebral disc space is maintained. All are possible except (AIIMS May 2011)
a. Tuberculosis spreads to spine through the vascular route and the lesions are para discal in spine and there is reduction in disc space.
b. Multiple Myeloma cause collapse of vertebra and disc spaces are spared. Single vertebra involvement is seen in localized variety of Multiple Myeloma called as Plasmacytoma.
c. Osteoporosis also causes involvement of multiple vertebra and can cause single vertebra involvement but disc is spared.
d. Metastasis spread to a vertebra and earliest part affected is pedicle and involvement of one pedicle destruction causes winking owl sign