Ulnar collateral ligament injuries of the first metacarpophalangeal joint: prevalence of associated injuries on radiographs and MRI

Sebastian Manneck, Filippo Del Grande, Anna Hirschmann

Research output: Contribution to journalArticlepeer-review

Abstract

Purpose: To evaluate the prevalence of associated findings at the first metacarpophalangeal joint on radiographs and MRI following acute ulnar collateral ligament (UCL) injuries. Materials and methods: This retrospective study included 25 patients with an injury of the UCL at MRI. Presence of associated injuries to the volar ligaments (checkrein and phalangoglenoid ligaments and volar plate) was assessed on radiographs and MRI independently by two musculoskeletal radiologists. Wilcoxon signed-rank test was used to compare frequencies of injuries between both modalities (p < 0.05). Interreader variability was calculated. Results: Complete tears of the UCL (48%/60%, reader 1/2) were more common than partial tears (24%/16%) on MRI. Dislocation of the UCL ≥ 3 mm was detected in 40%/56% on MRI. UCL avulsion fractures were more frequently seen on MRI (28%) compared with radiographs (12%) for reader 1. Associated avulsion injuries of the phalangoglenoid ligament were evident in 12%/8% on radiographs and in 80%/76% on MRI. Almost all patients (100%/79%) with a dislocated UCL tear showed a concomitant volar ligament injury; and even two-thirds (66%/72%) of the non-displaced UCL tears had an injury to the volar ligaments. Interreader agreement was moderate to excellent (κ = 0.60–1.0). Conclusion: UCL tears are often associated with volar ligament injuries, even in lesser degrees of an UCL injury.

Original languageEnglish (US)
Pages (from-to)505-513
Number of pages9
JournalSkeletal Radiology
Volume50
Issue number3
DOIs
StateAccepted/In press - 2020
Externally publishedYes

Keywords

  • Hand injuries
  • MRI
  • Metacarpophalangeal joint
  • Radiographs
  • Thumb
  • Ulnar collateral ligament
  • Volar plate

ASJC Scopus subject areas

  • Radiology Nuclear Medicine and imaging

Fingerprint Dive into the research topics of 'Ulnar collateral ligament injuries of the first metacarpophalangeal joint: prevalence of associated injuries on radiographs and MRI'. Together they form a unique fingerprint.

Cite this