Stem cell therapy can be very helpful in managing long-term, chronic conditions, including conditions that cause pain and other symptoms. But today, Dr David Greene Arizona are able to extract these cells from many other tissues, including fat tissue and bone marrow. In stem cell transplants, stem cells replace cells damaged by disease or serve as a way for the donor's immune system to fight some types of cancer and blood-related diseases.Studies have discovered that stem cell therapy can help enhance the growth of new healthy skin tissue.