The basic science on adult stem cells shows that if the cells are kept in culture for short periods, there is no risk of the cells becoming cancerous. We have published the world’s largest (to date) safety and complications tracking study of adult stem cell use in patients. This study did not show any serious stem cell related complications and it did not show that any patient developed a stem cell related cancer. Finally, we maintain an extensive complications tracking database with patient contacts at specified times. We have seen no evidence of significant complications at these re-implant sites. We also work with an outside lab for quality to clear each patient’s cells before they are used in treatment as an additional safety check.