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. 2016 Oct 4;18:222. doi: 10.1186/s13075-016-1125-8

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© The Author(s). 2016

Open AccessThis article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated.

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Fig. 2 — Bone erosions in patients with Jaccoud’s arthropathy. Longitudinal ultrasound (US) image of the lateral ulnar head area (U) showing a grade-2 scoring ultrasound structural erosion (ScUSSe) (arrow) with a hook-shaped deformity (arrow head) (a). U ulnae, R radial, *extensor carpi ulnaris tendon. Coronal computed tomography (CT) scan of the wrist showing a grade-4 rheumatoid arthritis magnetic resonance imaging score (RAMRIS) erosion (arrow) confirming the hook-shaped deformity (arrow head) with a bony sclerotic margin (b). Transversal US view of the second metacarpophalangeal (MCP) dorsal area showing a grade-3 ScUSSe hook-shaped (arrow head) erosion (arrow) (c) corresponding to a grade 3 RAMRIS score erosion (arrow) with hook-shaped deformity (arrow head) visible in the CT coronal scan of the hand (d). MH second metacarpal head