Chapter 4 Elbow AXIAL 88 CORONAL 108 SAGITTAL 124 Elbow Axial 1 Normal Variant The medial head of the triceps can wrap onto the anterior side of medial epicondyle and cause ulnar nerve entrapment. This finding is best seen with the elbow imaged in flexion. Note that this variant is not observed on the MR image here. Elbow Axial 1 Elbow Axial 2 Normal anatomy Note the intermediate signal throughout the triceps tendon. This is caused by the absence of tendon sheath, which results in connective tissue slips interdigitating among tendon fibers, creating a speckled appearance. This is especially evident on axial MR images. Elbow Axial 2 Elbow Axial 3 Normal anatomy One of the features that can help distinguish medial from lateral on axial elbow views is the prominence of the medial epicondyle. Note the origin of the common flexor tendon on the medial epicondyle. Normal Variant An accessory muscle termed the anconeus epitrochlearis is sometimes visible at this level. Although not present in the MR image here, it would be located posterior to the medial epicondyle and adjacent to the ulnar nerve. When present, this accessory muscle can cause ulnar nerve entrapment. Elbow Axial 3 Elbow Axial 4 Elbow Axial 4 Elbow Axial 5 Pathologic process The ulnar nerve is particularly prone to injury because of its superficial location. Elbow Axial 5 Elbow Axial 6 Elbow Axial 6 Elbow Axial 7 Elbow Axial 7 Elbow Axial 8 Pathologic process The distal biceps tendon lacks a tendon sheath; therefore, inflammation in the distal biceps tendon should not be diagnosed as “biceps tenosynovitis.” Instead, a fluid collection in the antecubital fossa is most often a bursitis and can occur in association with partial tears of the biceps tendon. Elbow Axial 8 Elbow Axial 9 Elbow Axial 9 Only gold members can continue reading. Log In or Register to continue Share this:Click to share on Twitter (Opens in new window)Click to share on Facebook (Opens in new window) Related posts: Forearm Upper Arm Plantar Plate Shoulder Knee Hand and Finger Stay updated, free articles. Join our Telegram channel Join Tags: Netter Correlative Imaging Musculoskeletal Anatomy Jan 17, 2016 | Posted by admin in MUSCULOSKELETAL IMAGING | Comments Off on Elbow Full access? Get Clinical Tree
Chapter 4 Elbow AXIAL 88 CORONAL 108 SAGITTAL 124 Elbow Axial 1 Normal Variant The medial head of the triceps can wrap onto the anterior side of medial epicondyle and cause ulnar nerve entrapment. This finding is best seen with the elbow imaged in flexion. Note that this variant is not observed on the MR image here. Elbow Axial 1 Elbow Axial 2 Normal anatomy Note the intermediate signal throughout the triceps tendon. This is caused by the absence of tendon sheath, which results in connective tissue slips interdigitating among tendon fibers, creating a speckled appearance. This is especially evident on axial MR images. Elbow Axial 2 Elbow Axial 3 Normal anatomy One of the features that can help distinguish medial from lateral on axial elbow views is the prominence of the medial epicondyle. Note the origin of the common flexor tendon on the medial epicondyle. Normal Variant An accessory muscle termed the anconeus epitrochlearis is sometimes visible at this level. Although not present in the MR image here, it would be located posterior to the medial epicondyle and adjacent to the ulnar nerve. When present, this accessory muscle can cause ulnar nerve entrapment. Elbow Axial 3 Elbow Axial 4 Elbow Axial 4 Elbow Axial 5 Pathologic process The ulnar nerve is particularly prone to injury because of its superficial location. Elbow Axial 5 Elbow Axial 6 Elbow Axial 6 Elbow Axial 7 Elbow Axial 7 Elbow Axial 8 Pathologic process The distal biceps tendon lacks a tendon sheath; therefore, inflammation in the distal biceps tendon should not be diagnosed as “biceps tenosynovitis.” Instead, a fluid collection in the antecubital fossa is most often a bursitis and can occur in association with partial tears of the biceps tendon. Elbow Axial 8 Elbow Axial 9 Elbow Axial 9 Only gold members can continue reading. Log In or Register to continue Share this:Click to share on Twitter (Opens in new window)Click to share on Facebook (Opens in new window) Related posts: Forearm Upper Arm Plantar Plate Shoulder Knee Hand and Finger Stay updated, free articles. Join our Telegram channel Join Tags: Netter Correlative Imaging Musculoskeletal Anatomy Jan 17, 2016 | Posted by admin in MUSCULOSKELETAL IMAGING | Comments Off on Elbow Full access? Get Clinical Tree
