What does the radial tunnel look like on ultrasound?

What does the radial tunnel look like on ultrasound?

Everyday MSK
What does the radial tunnel look like on ultrasound? Under normal ultrasound imaging, the radial nerve and the "tunnel" of structures surrounding it can be visualized in the short-axis view across the anterior upper forearm.  Look for the hyperechoic/bright dome of the radial head at the bottom "floor" of the image and then the hypoechoic supinator muscle curving over the top of the bone (there are two muscle "heads"). The radial nerve resembles a bright hyperechoic oval with a honeycomb texture sitting within or just above the supinator.  The brachioradialis muscle above forms the "ceiling" of the tunnel over the radial nerve, the extensor carpi radialis longus and brevis muscles laterally, and the brachialis medially.  Technically speaking, radial tunnel syndrome describes the entrapment of the deep branch of the radial…
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What does a triceps tendon tear look like on ultrasound?

What does a triceps tendon tear look like on ultrasound?

Everyday MSK
What does a triceps tendon tear look like on ultrasound? What do injuries of the triceps tendon look like with ultrasound imaging? The top image shows the distal triceps tendon with tendinosis at its attachment on the proximal ulna (the olecranon process). The distal tendon is thickened with a loss of normal fibrous echotexture. There is hypoechogenicity (darkening) of the superficial layer of the conjoined tendon (white arrow) compared to the deep portion (orange arrow) and a loss of the normal tendon tapering conformity at the insertion on the olecranon. The bottom image shows a selective area of complete fiber non-visualization of the distal triceps tendon’s superficial portion near its insertion on the olecranon (white arrow), demonstrating a high-grade partial tendon avulsion/tear. Note that the deep fibers of the medial…
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