CASE 3

Courtesy of Alabeer Medical Clinics, Jeddah, Saudi Arabia

Adult with low back pain radiating to the right leg

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CASE 3 ANSWER

Baastrup Syndrome

There is interspinous bursa fluid (yellow arrow) and bilateral facet joints effusion (white arrows). An associated right posterolateral facet joint synovial cyst is noted (yellow circle), with mass-effect on the adjacent thecal sac

Key Points

• Contact of adjacent spinous processes (kissing spine), with resultant reactive changes that may cause back pain.

• MRI can reveal interspinous bursa fluid and an associated posterocentral epidural cysts.

• Can be treated by conservative or surgical means.