Stem cells offer the opportunity of transplanting a live source for self-regeneration. Transplants of bone marrow (BMT its acronym in English) is a recognized clinical application of stem cell transplantation. The BMT can repopulate the bone marrow and restore all types of blood cells after a patient has received high-dose chemotherapy and / or radiotherapy, which we use as our main tool to kill cancer cells endogenous. The isolation of stem cells and progenitor cells further is now being developed to support many other clinical applications.