Article Figures & Data
Figures
- Figure 1
(A) Prerevision thoracolumbar proximal junctional failure (PJF). (B) Postrevision thoracolumbar PJF. (C) Prerevision proximal thoracic PJF. (D) Postrevision proximal thoracic PJF.
- Figure 2
Direct costs associated with index surgery for adult spinal deformity and readmissions by indication. PJK, proximal junctional kyphosis. Source: Reprinted with permission form Yeramaneni et al.27
Tables
- Table 1
Classification of the grades and severity of proximal junctional kyphosis and PJF.10
Classification Description Type 1 Disc and ligamentous failure 2 Bone failure 3 Implant/bone interface failure Grade A Proximal junctional increase 10°–19° B Proximal junctional increase 20°–29° C Proximal junctional increase 30° Spondylolisthesis PJF-N No obvious spondylolisthesis above UIV PJF-S Spondylolisthesis above UIV Abbreviations: PJF, proximal junctional failure; UIV, uppermost instrumented vertebra.
- Table 2
The Hart-International Spine Study Group proximal junctional kyphosis severity scale.
Parameter and Qualifier Severity Scale Neurological deficit None 0 Radicular pain 2 Myelopathy/motor deficit 4 Focal pain None 0 VAS ≤ 4 1 VAS ≥ 5 3 Instrumentation problem None 0 Partial fixation loss 1 Prominence 1 Complete fixation loss 2 Change in kyphosis/PLC integrity 0°–10° 0 10°–20° 1 >20° 2 PLC failure 2 UIV/UIV+1 fracture None 0 Compression fracture 1 Burst/chance fracture 2 Translation 3 Level of UIV Thoracolumbar junction 0 Upper thoracic spine 1 Abbreviations: PLC, posterior ligamentous complex;UIV, uppermost instrumented vertebra; VAS, visual analog scale.
Note: Reprinted with permission from Hart et al.13
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