Figure 3From: Immunohistological assessment of the synovial tissue in small joints in rheumatoid arthritis: validation of a minimally invasive ultrasound-guided synovial biopsy procedureMicrophotograph of an ultrasound-guided sample. H & E staining of a metacarpophalangeal sample of a rheumatoid arthritis patient (patient U-SY1), a result of multiple high-power fields (40Ă— objective) merged into a single image (montage).Back to article page