Figure 6.

Immunohistochemical images of clinically failed cartilage tissues stained with antibodies against collagen type IV (top row) and laminin (bottom row). Tissue despite prior treatment generally consisted of fibrocartilage and fibrous tissue, but hyaline cartilage was also detected in the failed ACI group. Collagen type IV and laminin was generally absent in the PCM. Green arrows = positive pericellular staining. Low magnification images: Bar = 200 μm. High magnification images: Bar = 30 μm.