Figure 1From: Immunohistological assessment of the synovial tissue in small joints in rheumatoid arthritis: validation of a minimally invasive ultrasound-guided synovial biopsy procedureUltrasound-guided synovial biopsy of a second metacarpophalangeal joint using the portal and forceps technique. Arrow, open forceps inside the joint; asterisk, metacarpal hand.Back to article page