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

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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.