Foreign body granulomas (fibrosis generated by the organism surrounding the injected toxic product) are caused by the illegal injection of permanent synthetic substances; high viscosity fluids such as oils, paraffin, Vaseline, PMMA (polymethylmethacrylate), liquid industrial silicones, and the wrongly named biopolymers for aesthetic purposes (increasing or modeling the body contour). They are known as “siliconomas” or “biopolymers”. Another origin of granulomas may be the leakage of silicone gel from ruptured breast implants.