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. 2019 Sep 25;8(10):1540. doi: 10.3390/jcm8101540

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© 2019 by the authors.

Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).

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(A) Doppler US and (B) superposed images show the hypervascular and swollen ulnar collateral ligament (white arrow and blue shade) and ECU tendon as well as an avulsed fragment of the triquetrum (black arrowhead and grey shade) under the long-axis approach. (C) US and (D) superposed US images show rupture of the ECU tendon subsheath (black arrow and purple shade) with subluxation of the extensor carpi ulnaris (ECU) tendon (dark grey shade) using the short-axis approach. The different color dashed rectangles are in accordance with the transducer positions in Figure 3. US: ultrasound; U: ulna; L: lunate; T: triquetrum; ECU: extensor carpi ulnaris.