Figure 3

Immunohistochemical staining with CD 105 of all types of periprosthetic membranes. Magnification: 100x. a Type I (wear particle induced type) without proof of CD 105-positive endothelium. b Type II (infectious type) with high amount of CD 105-positive endothelium. c Type III (combined type) with slightly distinctive proof of CD 105. d Type IV (indeterminate type) without proof of CD 105.