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(A)
(B)
(C)
(D)
(E)
(F)
FIGURE 44.17
Nineteen-year-old male with type IV OI who presented with low back pain. He ambulated from age 2 to 5, then stopped,
and began ambulating again at age 16. Treated with multiple doses of Aredia. (A, B) Noted to have spondylolisthesis of lower lumbar vertebra
at multiple levels with a markedly abnormal flexed posture on AP and lateral spine X-rays at age 19. (C) Sitting lateral at age 9 showing ver-
tebral changes and elongated pedicles but no listhesis. (D) Sitting lateral at age 19 with severe pedicle elongation and multiple
level
listhesis.
(E) Severely elongated pedicles and listhesis on CT with auto fusion of posterior elements. (F) CT showing chronic spondylolysis at level above
the rigid auto fusion.
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