Figure 1.
Categories of foreign body reactions to injected silicone. Category 1: No visible reaction. Category 2: Mild reaction with a few inflammatory cells. Category 3: Inflammatory cells and one or 2 giant cells. Category 4: Inflammatory cells and more than 2 giant cells. Less than 50% of the area is fibrotic. Category 5: Inflammatory cells and more than 2 giant cells. Less than 50% of the area is fibrotic. Category 6: Inflammatory cells and one giant cell. Less than 50% of the area is fibrotic. Category 7: Less than 50% of the area is fibrotic. No giant cells. Category 8: Less than 50% of the area is fibrotic. No giant cells.