PMC4383127_01
Ankylosing spondylitis: sacroiliitis (roentgenogram)
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F1
Radiological studies done 1 month previously, revealed solid ankylosis of the facet joints between all lumbar vertebrae [Figure 1].
Catheters inside the psoas compartment and parasacral space
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F2
Approximately, 5 mL of contrast (iohexol with 300 mg/mL Ominipaque ) were injected in both catheters to study the dispersion of a local anesthetic [Figure 2].