spondyloptosis
Pronunciation: spon-di-lop-TOH-sis
Complete anterior displacement of a vertebra, representing the most severe form of spondylolisthesis where the vertebral body slips entirely off the vertebra below.
Full Definition
Spondyloptosis is the most severe grade of spondylolisthesis, involving complete anterior displacement of a vertebra with 100% slippage off the vertebral body below. This condition typically occurs at the L5-S1 level and represents a Grade V spondylolisthesis according to the Meyerding classification. The complete displacement creates significant spinal instability and often requires complex surgical intervention including reduction, instrumentation, and fusion. Editors should note this term is distinct from other grades of spondylolisthesis and represents a surgical emergency requiring immediate attention.
Usage
Usage note: Always distinguish from lesser grades of spondylolisthesis in medical writing; this term specifically denotes complete displacement.
In Context
- "The patient presented with L5 spondyloptosis requiring emergent surgical stabilization." — surgical case report
- "Complete neurological evaluation is essential in cases of spondyloptosis due to the high risk of cauda equina involvement." — clinical assessment guidelines