pseudarthrosis
Pronunciation: SOO-dar-throh-sis
Failed spinal fusion resulting in persistent motion at the intended fusion site.
Full Definition
A complication of spinal fusion surgery where bone healing fails to occur across the intended fusion segments, resulting in the formation of a false joint (pseudarthrosis). This condition is characterized by persistent motion at the fusion site, often accompanied by pain and potential instrumentation failure. Pseudarthrosis may be detected through imaging studies showing lack of bridging bone formation, or clinically through persistent symptoms and positive stress radiographs. Treatment typically requires revision surgery with additional bone grafting.
Usage
Usage note: Also spelled 'pseudoarthrosis'. Represents a significant surgical complication requiring careful documentation.
In Context
- "CT scan revealed pseudarthrosis at the L4-L5 fusion site with persistent motion on flexion-extension films." — Diagnostic imaging report
- "Risk factors for pseudarthrosis include smoking, obesity, and multilevel fusion procedures." — Patient counseling documentation