Screw Backing Out
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Wound Infection
Seroma and Epidural Scar
Epidural Hematoma - CT
Epidural Hematoma - MRI
Instability
Graft Reabsorption
Endplate Fracture
Graft Collapse
Nonunion
Displaced Strut Graft
Broken Screw
Screw in Spinal Canal
Slipped rod
Screw in Disc space
Screw Loosening & Hematoma
Screw Backing Out
Screw Loosening

Screws and Graft Displacement

The patient is a 46-year-old male who had undergone the corpectomies of C5-6 and discectomies at C4-7 with anterior plate fusion and bone grafting for cervical myelopathy resulting from cervical stenosis as well as kyphotic deformity. Thereafter, the patient noted increased spasm of his right arm as well as right leg. Work up revealed that the patient had dislodged the inferior portion of the bone graft as well as the plate.

This post-operative radiograph suggests normal alignment of the bone graft and fixation plate

 

Lateral CT scout - Click on the image to enlarge Scout image from a CT obtained 3 months later  suggests ventral displacement of the bone graft and fixation plate.
CT Bone window - Click on the image to enlarge This axial CT taken at the same time shows to better advantage how the distal screws are fully out of the ventral cortex of C7 on the right hand distal screw and only 1 thread of the left hand distal screw remains in the bone itself. The fixation plate is also 1cm ventral to the body of C7 at this level.
Click on the images to view a larger version!

 


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