Book contents
- Frontmatter
- Contents
- List of contributors
- Foreword
- Preface
- Section 1 Shoulder
- Section 2 Arm
- Section 3 Elbow
- Case 19 Pseudodefect of the capitellum versus osteochondral defect
- Case 20 Pseudodefect of the trochlear groove versus fracture
- Case 21 Transverse trochlear ridge versus osteophyte or post-traumatic deformity
- Case 22 FABS positioning on MRI: demonstration of distal biceps tear
- Case 23 Ulnar collateral ligament tear versus normal recess of the elbow
- Case 24 T-sign of undersurface partial tear of the ulnar collateral ligament
- Case 25 Lateral ulnar collateral ligament tears
- Case 26 Locations and evaluation of loose bodies in the elbow joint
- Case 27 Osteochondritis dissecans of the elbow: stable versus unstable
- Case 28 Little Leaguer’s elbow: what is it?
- Section 4 Forearm
- Section 5 Wrist
- Section 6 Hand
- Section 7 Hip and Pelvis
- Section 8 Thigh
- Section 9 Leg
- Section 10 Ankle
- Section 11 Foot
- Section 12 Tumors/Miscellaneous
- Index
- References
Case 25 - Lateral ulnar collateral ligament tears
from Section 3 - Elbow
Published online by Cambridge University Press: 05 July 2013
- Frontmatter
- Contents
- List of contributors
- Foreword
- Preface
- Section 1 Shoulder
- Section 2 Arm
- Section 3 Elbow
- Case 19 Pseudodefect of the capitellum versus osteochondral defect
- Case 20 Pseudodefect of the trochlear groove versus fracture
- Case 21 Transverse trochlear ridge versus osteophyte or post-traumatic deformity
- Case 22 FABS positioning on MRI: demonstration of distal biceps tear
- Case 23 Ulnar collateral ligament tear versus normal recess of the elbow
- Case 24 T-sign of undersurface partial tear of the ulnar collateral ligament
- Case 25 Lateral ulnar collateral ligament tears
- Case 26 Locations and evaluation of loose bodies in the elbow joint
- Case 27 Osteochondritis dissecans of the elbow: stable versus unstable
- Case 28 Little Leaguer’s elbow: what is it?
- Section 4 Forearm
- Section 5 Wrist
- Section 6 Hand
- Section 7 Hip and Pelvis
- Section 8 Thigh
- Section 9 Leg
- Section 10 Ankle
- Section 11 Foot
- Section 12 Tumors/Miscellaneous
- Index
- References
Summary
Imaging description
On non-contrast MRI studies, tears of the lateral ulnar collateral ligament are best seen on coronal proton density fat-suppressed images that have a matrix equal to or greater than 256 × 512. If an MR arthrogram is performed, tears of this ligament are best seen on coronal T1-weighted fat-suppressed images. Normally, the lateral ulnar collateral ligament is seen as a uniformly low-signal intensity. It is attached proximally to the lateral epicondyle and extends distally to insert on the supinator crest of the ulna (Figure 25.1). Disruption or tearing of the lateral ulnar collateral ligament most commonly occurs at its proximal attachment to the lateral epicondyle. More recent research has shown that tearing of the lateral ligamentous complex attachment to the lateral epicondyle (be it the radial collateral ligament or the lateral ulnar collateral ligament) can result in posterolateral rotatory instability of the elbow. In addition, the lateral ulnar collateral ligament can be torn in its midportion, which is also associated with posterolateral rotatory instability of the elbow (Figure 25.2). Lastly, there are those that consider the lateral ligament complex to be a unified single structure (rather than separate radial collateral, lateral ulnar collateral, and annular ligaments) that extends from the lateral humeral epicondyle to attach to the supinator crest and the sigmoid notch. If this is true, then any disruption of this complex may lead to posterolateral rotatory instability at the elbow.
- Type
- Chapter
- Information
- Pearls and Pitfalls in Musculoskeletal ImagingVariants and Other Difficult Diagnoses, pp. 50 - 52Publisher: Cambridge University PressPrint publication year: 2013