Fig. 5
From: Synovial mast cells from knee and hip osteoarthritis: histological study and clinical correlations
Samples from patients with hip osteoarthritis and from hip and knee control groups. A, B and C. Paraffin sections stained for CD117. Mast cells are identified by brown reaction product. B and C. Low grade of synovial inflammation. A and B, 20 × magnification; C, 40 × magnification. D, E and F. Paraffin sections stained for CD31. Vessels are identified by brown reaction product. Significant synovial hypervascularity can be seen in D