A 51 years old male patient, known case of ankylosing spondylitis since many years, had severly curved totally fused spine. He suffered a minor fall followed by weakness of limbs. Due to the curvature, he did not fit in the MRI machine. A CT was done which showed frature of the lower cervical spine with displacement. CT myelogram was then tries but could not be done from the lumbar site as the needle could not be passed through the heavily calcified tissue. Then the needle was inserted through the suboccipital route and contrast injected to perform the CT-myelo.
The myelogram showed partial obstruction to the contrast flow however the compression was not extremely severe. The patient was operated and the spine fixed.