Magnetic resonance imaging-based classification for ulnar collateral ligament injuries of the elbow.

Abstract:

BACKGROUND:Magnetic resonance imaging (MRI) arthrography has been considered the gold standard for imaging ulnar collateral ligament (UCL) injuries. No classification system has been described for UCL tears to help discuss and guide treatment options. We propose that an MRI-based UCL classification system would correlate with valgus laxity and help predict surgical management. METHODS:The MRIs from 240 patients who underwent UCL reconstruction were reviewed and classified according to a system based on severity and location of the UCL injury. Bilateral elbow valgus stress radiographs were used to compare the amount of valgus laxity associated with each grade of UCL injury. Additional data from the imaging review included intraligamentous calcifications, T-sign presence, and a newly described "vacuum sign." RESULTS:The amount of valgus stress opening increased with the classification severity as follows: type I, 0.13 mm; type II, 0.20 mm; type III, 0.63 mm; and type IV, 0.76 mm. CONCLUSIONS:We propose a new classification for UCL injuries based on MRI findings that helps predict valgus laxity, improve communication, and guide treatment for UCL pathology in throwing athletes.

journal_name

J Shoulder Elbow Surg

authors

Joyner PW,Bruce J,Hess R,Mates A,Mills FB 4th,Andrews JR

doi

10.1016/j.jse.2016.05.006

subject

Has Abstract

pub_date

2016-10-01 00:00:00

pages

1710-6

issue

10

eissn

1058-2746

issn

1532-6500

pii

S1058-2746(16)30147-1

journal_volume

25

pub_type

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