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Related Experiment Video

Updated: May 29, 2025

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Ulnar Impaction Syndrome and TFCC Injury: Their Relationship and Management.

Jin-Hyung Im1, Jin-Woo Lee2, Joo-Yup Lee2

  • 1Department of Orthopedic Surgery, Yeouido St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea.

Journal of Wrist Surgery
|February 3, 2025
PubMed
Summary

Ulnar-sided wrist pain may stem from ulnar impaction syndrome (UIS) or triangular fibrocartilage complex (TFCC) injury. This review explores the potential bidirectional relationship between TFCC injury and UIS, suggesting one can cause the other.

Keywords:
combined proceduretriangular fibrocartilage complextriangular fibrocartilage complex repairulnar impaction syndromeulnar shortening osteotomyulnar styloid process impactionulnar-sided wrist pain

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Area of Science:

  • Orthopedics
  • Hand Surgery
  • Wrist Biomechanics

Background:

  • Ulnar-sided wrist pain is a common complaint.
  • Ulnar impaction syndrome (UIS) and triangular fibrocartilage complex (TFCC) injuries are frequent causes.
  • Existing literature often addresses UIS and TFCC injuries as independent entities.

Purpose of the Study:

  • To review the existing literature on ulnar impaction syndrome (UIS) and triangular fibrocartilage complex (TFCC) injuries.
  • To explore the potential co-occurrence and relationship between UIS and TFCC injuries.
  • To propose a theoretical framework for TFCC injury as both a cause and consequence of UIS.

Main Methods:

  • Literature review of studies on UIS and TFCC injuries.
  • Analysis of biomechanical principles related to wrist function.
  • Synthesis of clinical observations and theoretical concepts.

Main Results:

  • UIS and TFCC injuries are distinct conditions with established diagnostic criteria.
  • Limited research exists on the concurrent presentation and interplay between UIS and TFCC injuries.
  • Clinical experience suggests a potential cyclical relationship where TFCC injury may lead to UIS, and UIS may exacerbate or cause TFCC tears.

Conclusions:

  • TFCC injury and UIS may not be mutually exclusive and could be interrelated.
  • A bidirectional relationship is proposed, where TFCC injury can be a cause of UIS, and UIS can result from or worsen TFCC pathology.
  • Further research is warranted to elucidate the exact nature of the relationship between TFCC injury and UIS in patients with ulnar-sided wrist pain.