1. (A–B) Images of US ...
(A–B) Images of US assessment of both patients who developed peripheral arthritis during vedolizumab treatment undergoing US-guided ST biopsy. Representative images of double-immunostaining for (C–D) CD68(RED)(thin black arrow)/CD21(DAB)(black arrow head) cells, (E–F) CD3(RED)(thin black arrow)/CD20(DAB)(black arrow head) cells, (G–H) CD117(DAB)(thin black arrow) cells, (I–J) CD138(DAB)(thin black arrow) cells and (K–L) CD31(DAB)(thin black arrows and black arrow heads) cells in ST of patients who developed peripheral arthritis during vedolizumab treatment. Scale bar, 20 μm. ST: synovial tissue.
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