Medial collateral ligament complex of the elbow

The elbow:

review of anatomy and common collateral ligament complex pathology using MRI. Elbow illustration. Medial view (a) demonstrating the medial collateral ligament complex: anterior bundle of the medial collateral ligament (A-MCL), posterior bundle of the medial collateral ligament (P-MCL), and transverse ligament (T-MCL). Lateral view (b) demonstrating the lateral collateral ligament complex: lateral ulnar collateral ligament (LUCL), radial collateral ligament (RCL), and annular ligament (AL)

The elbow:

review of anatomy and common collateral ligament complex pathology using MRI. Consecutive coronal FS PD-weighted MRI (a–c) showing the intact anterior bundle of the medial collateral ligament (A-MCL) complex (white asterisks). It extends from the inferior aspect of the medial epicondyle (ME) to the sublime tubercle of the ulna (white arrowheads). Note the typical striated appearance of the normal proximal A-MCL (white arrows)

The elbow:

review of anatomy and common collateral ligament complex pathology using MRI. Axial T1-weighted MRI (a) and axial FS PD-weighted MRI (b) in two different healthy volunteers showing the intact posterior bundle of the medial collateral ligament complex (white arrows). It extends from the posterior aspect of the medial epicondyle (ME) to the medial aspect of the olecranon process (OP). Cubital tunnel retinaculum (white arrowhead). Ulnar nerve (yellow asterisks). Anconeus epitrochlearis muscle (white asterisk)

The elbow:

review of anatomy and common collateral ligament complex pathology using MRI. Two different patients with chronic elbow pain and medial instability. Coronal FS PD-weighted MRI (a) showing a chronically thickened anterior bundle of the medial collateral ligament (white arrowhead). Coronal FS PD-weighted MRI (b) showing a chronically thickened anterior bundle of the medial collateral ligament (white arrow), and a deformity of the sublime tubercle due to malunion of an old fracture (white asterisk)