Verletzungen des medialen Kollateralbandkomplexes des Ellenbogens

The elbow:

review of anatomy and common collateral ligament complex pathology using MRI. A 25-year-old man with pain and medial instability after a fall on an outstretched hand. Axial T1-weighted MRI (a) showing the intact right posterior bundle of the medial collateral ligament complex of a healthy volunteer (white arrowhead). Axial FS PD-weighted MRI (b) showing an acute tear of the left posterior bundle of the medial collateral ligament complex (white arrow), inflammatory changes in the soft tissue of cubital tunnel (white asterisk), displacement and flattening of the ulnar nerve (yellow arrow), and joint effusion (black asterisks)

The elbow:

review of anatomy and common collateral ligament complex pathology using MRI. Posterolateral rotatory instability, stage 3B. Consecutive coronal FS T1-weighted direct MR arthrographic images (a–f) showing a proximal partial-thickness tear of the anterior bundle of the medial collateral ligament complex (short arrows), proximal complete tear of the lateral ulnar collateral (long white arrows), and partial-thickness tear of the radial collateral ligament proper (white arrowhead)

The elbow:

review of anatomy and common collateral ligament complex pathology using MRI. Posterior coronal view (a–d) of the elbow showing the mechanism of injury in the overhead athlete with repeated valgus stress

The elbow:

review of anatomy and common collateral ligament complex pathology using MRI. A 23-year-old man with pain and medial instability after a fall on the outstretched arm. Coronal FS PD-weighted MRI (a) and coronal T1-weighted MRI (b) showing an acute full-thickness proximal tear of the anterior bundle of the medial collateral ligament complex (yellow arrows), a flexor digitorum superficialis muscle edema (white asterisk), a radial head and posterior capitellar contusions (white arrows), and joint effusion

The elbow:

review of anatomy and common collateral ligament complex pathology using MRI. A 32-yer-old man with pain and medial instability after a fall on the outstretched arm. Coronal T1-weighted MRI (a) and coronal FS PD-weighted MRI (b) showing an acute avulsion fracture of the anterior bundle of the medial collateral ligament insertion in the sublime tubercle (white arrows), acute partial-thickness proximal tear of anterior bundle of the medial collateral ligament (blue arrow), flexor digitorum superficialis muscle edema (white asterisk), and radial head contusion (white arrowhead)

The elbow:

review of anatomy and common collateral ligament complex pathology using MRI. Posterolateral rotatory instability, stage 3B. Consecutive coronal FS T1-weighted direct MR arthrographic images (a, b), sagittal FS T1-weighted direct MR arthrographic image (c), and consecutive axial FS T1-weighted direct MR arthrographic images (d, e) showing a proximal complete tear of the lateral ulnar collateral ligament and radial collateral ligament proper (white short arrows), diffuse partial-thickness tear of the anterior bundle of the medial collateral ligament complex (white arrowheads), and a non-displaced fracture of the coronoid process (long white arrows)

The elbow:

review of anatomy and common collateral ligament complex pathology using MRI. Posterolateral rotatory instability, stage 3C. Consecutive coronal FS T1-weighted direct MR arthrographic images (a–c), and consecutive axial FS T1-weighted direct MR arthrographic images (d–f) demonstrating a full-thickness tear of the anterior bundle of the medial collateral ligament complex (yellow arrow), proximal full-thickness tear of the common flexor tendon (short white arrows), proximal full-thickness tear of the common extensor tendon (white arrowheads), proximal complete tear of the lateral ulnar collateral ligament and radial collateral ligament proper (long white arrows), and a complete tear of the posterior bundle of the medial collateral ligament complex (yellow arrowheads)

The elbow:

review of anatomy and common collateral ligament complex pathology using MRI. Posterolateral rotatory instability, stage 3B. Sagittal FS PD-weighted MRI (a) and consecutive coronal FS PD-weighted MRI (b, c) showing a posterolateral subluxation of the radial head (white arrowhead), proximal disruption of the lateral ulnar collateral ligament (white arrow), partial proximal disruption of the radial collateral ligament (yellow arrow), proximal disruption of the anterior bundle of the medial collateral ligament (blue arrow), radial head and posterior capitellar contusions (white asterisks), and joint effusion (black asterisks)

The elbow:

review of anatomy and common collateral ligament complex pathology using MRI. Posterolateral rotatory instability, stage 3B. Coronal T1-weighted MRI (a) and coronal FS PD-weighted MRI (b) showing an acute proximal common avulsion of the lateral ulnar collateral ligament and radial collateral ligament (white arrows), an acute avulsion of the anterior bundle of the medial collateral ligament complex (white arrowheads), a radial head fracture (white asterisks), a partial tear of the proximal common extensor tendon (yellow arrows), and joint effusion