PMC

Sagittal proton density MRI sequence (A) demonstrates an acute partial tear of the triceps insertion (arrow) superimposed on preexisting tendinosis. One year later (B), a repeat MRI shows improved appearance of the triceps tendon but residual tendinosis (arrow). Images courtesy of Hollis G. Potter, MD.

Coronal proton density (A) and gradient recalled acquisition (B) MR sequences demonstrate degeneration of the origin of the extensor carpi radialis brevis tendon (arrow) with a high-grade partial intrasubstance tear (arrowhead). Images courtesy of Hollis G. Potter, MD.

MRI of the left elbow demonstrates extracapsular soft tissue edema (arrow) on a coronal inversion recovery sequence (A). A high-grade proximal tear is noted in the extensor carpi radialis brevis tendon (arrowhead) on the coronal proton density sequence (B). Images courtesy of Hollis G. Potter, MD.

MRI was performed including sagittal (A, C) and axial (B, D) proton density sequences of the left elbow. A high-grade insertional partial tear of the biceps tendon at the radial tuberosity was identified (A, B – arrows). A large septate ganglion (C, D – arrowheads) was noted communicating with the bicipitoradial bursa, compressing the posterior interosseous nerve (D – star) at the supinator muscle. Images courtesy of Hollis G. Potter, MD.

Coronal gradient recalled acquisition (A) and sagittal proton density (B) MR sequences, performed to “rule out lateral epicondylitis”, demonstrate only mild tendinosis (A - arrow) of the extensor carpi radialis brevis without discrete tear. Full-thickness cartilage loss, however, with bone-on-bone apposition at the radiocapitellar joint (B – arrowhead) was identified as the source of the patient’s symptoms. Images courtesy of Hollis G. Potter, MD.