PMC8720453_01
Total spine plain radiographs, (a) AP view shows modified New York Grade 3 sacroiliitis with sclerosis of both sacroiliac joints and (b) lateral view demonstrates complete syndesmophytes formation in thoracic (BASRI score of 4) and interrupted in the lumbar spine (BASRI score of 3).
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F1
Total spine radiographs showed AS [Figure 1].
Thoracic spine MRI, (a) T2-weighted sagittal images show beak type ossification of the ligamentum flavum (OLF) at T9-T10 and (b) axial image shows right sided big OLF.
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F2
The CT further confirmed the T9-T10 AS/OLF [Figures 2 and 3]. The T9-T10 laminectomy revealed a large right-sided OLF ossified mass that was densely adherent to the dura; it was carefully dissected free and removed. Two months later, the patient's neurological exam was much improved (i.e., preoperative mJOA score of 7 to a postoperative mJOA score of 9).
Reconstructed CT scan of thoracic spine, (a) coronal view shows a right sided T9-T10 ossification of the ligamentum flavum (OLF) and (b) sagittal view shows a beak type TOLF, note bamboo spine in thoracic (BASRI score of 4) and interrupted syndesmophytes formation in lumbar spine (BASRI score of 3).
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F3
The CT further confirmed the T9-T10 AS/OLF [Figures 2 and 3]. The T9-T10 laminectomy revealed a large right-sided OLF ossified mass that was densely adherent to the dura; it was carefully dissected free and removed. Two months later, the patient's neurological exam was much improved (i.e., preoperative mJOA score of 7 to a postoperative mJOA score of 9).