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. 2018 Oct 26;4(2):e000799. doi: 10.1136/rmdopen-2018-000799

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© Author(s) (or their employer(s)) 2018. Re-use permitted under CC BY. Published by BMJ.

This is an open access article distributed in accordance with the Creative Commons Attribution 4.0 Unported (CC BY 4.0) license, which permits others to copy, redistribute, remix, transform and build upon this work for any purpose, provided the original work is properly cited, a link to the licence is given, and indication of whether changes were made. See: http://creativecommons.org/licenses/by/4.0

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(A) The ultrasound-guided needle biopsy (US-NB) procedure of wrist, in outpatient clinic using local anaesthesia. In the lower right corner example of biopsy needle. (B) Image of ultrasound guidance during US-NB procedure. (C) and (D) Portal and forceps technique: using rigid and flexible forceps through a disposable portal under local anaesthesia, (E) Synovial sampling within the knee joint under ultrasound control. (F) Arthroscopy of wrist, in operating theatre, patient under general anaesthesia. In lower corner examples of biopsy equipment. (G) Video guidance used to visualise synovium during arthroscopy.