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. 2021 Dec 31;105(1):90. doi: 10.5334/jbsr.2709

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Copyright: © 2021 The Author(s)

This is an open-access article distributed under the terms of the Creative Commons Attribution 4.0 International License (CC-BY 4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. See http://creativecommons.org/licenses/by/4.0/.

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Triquetrum occult fracture with synovitis in the prestyloid recess and traumatic bone avulsion with subacute edematous infiltration of the dorsal capsular ligaments — Triquetrum occult fracture with synovitis in the prestyloid recess and traumatic bone avulsion with subacute edematous infiltration of the dorsal capsular ligaments. MR arthrography performed 12 days after a fall on an outstrechted hand allows detection of bone marrow edema in the dorsal part of the triquetrum on coronal proton-density fat-saturated images (a) and sagittal 0.4mm reconstruction from a 3D proton-density fat-saturated sequence (b), as well as edematous infiltration of the surrounding dorsal soft tissues (arrows on b). The dorsally avulsed bony fragments are better seen on CT (arrow on c). The dorsal capsular infiltration (mostly the extrinsic dorsal radiotriquetral ligament) with low to intermediate signal intensity is also depicted on the sagittal reconstruction from the 3D DESS sequence (arrows on d).