Figure 3: From the site of an infected implant, a biopsy was taken. Following haematoxylin staining, the eroded bone with prominent resorption lacunae appears pink. Next to it, osteoclasts are seen (giant cells with numerous nuclei, marked by thick arrows) and the tissue is infiltrated by PMN (thin arrows) (figure courtesy of Dr. M. M. Gaida, Institute of Pathology, University of Heidelberg).