Proximal Junctional Kyphosis in Adult Spinal Deformity: Definition, Classification, Risk Factors, and Prevention Strategies

Hong Jin Kim, Jae Hyuk Yang, Dong Gune Chang, Se Il Suk, Seung Woo Suh, Sang Il Kim, Kwang Sup Song, Jong Beom Park, Woojin Cho

Research output: Contribution to journalArticlepeer-review

10 Scopus citations

Abstract

Proximal junctional problems are among the potential complications of surgery for adult spinal deformity (ASD) and are associated with higher morbidity and increased rates of revision surgery. The diverse manifestations of proximal junctional problems range from proximal junctional kyphosis (PJK) to proximal junctional failure (PJF). Although there is no universally accepted definition for PJK, the most common is a proximal junctional angle greater than 10° that is at least 10° greater than the preoperative measurement. PJF represents a progression from PJK and is characterized by pain, gait disturbances, and neurological deficits. The risk factors for PJK can be classified according to patient-related, radiological, and surgical factors. Based on an understanding of the modifiable factors that contribute to reducing the risk of PJK, prevention strategies are critical for patients with ASD.

Original languageEnglish (US)
Pages (from-to)440-450
Number of pages11
JournalAsian Spine Journal
Volume16
Issue number3
DOIs
StatePublished - Jun 2022

Keywords

  • Adult spinal deformity
  • Prevention strategies
  • Proximal junctional failure
  • Proximal junctional kyphosis
  • Proximal junctional problems

ASJC Scopus subject areas

  • Surgery
  • Orthopedics and Sports Medicine

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