Management of High-Grade Dysplastic Spondylolisthesis

The Meyerding classification grades the degree of slippage in the sagittal plane on lateral standing neutral imaging: 0% to 25% Grade I, 25% to 50% Grade II, 50% to 75% Grade III, 75% to 100% Grade IV, and greater than 100% Grade V (Spondyloptosis). Grades I and II are considered low-grade and Grades III-V are considered high-grade. There are several etiologies of spondylolisthesis. A classification system of the most common causes: Type I – Dysplastic, Type II – Isthmic (including subtypes: A – Lytic, B – Elongation, and C – Acute fracture), Type III – Degenerative, Type IV – Traumatic, Type V – Pathologic, and Type VI – Iatrogenic. Dysplastic spondylolisthesis is a type of spondylolisthesis that occurs at L5-S1 whe n dysplastic lumbosacral anatomy is present, and is associated with high-grade slip and spina bifida occulta.
Source: Neurosurgery Clinics of North America - Category: Neurosurgery Authors: Source Type: research