Dr. Ratajczak is an internationally known specialist in the field of adult stem cell biology. His 2005 discovery of embryonic-like stem cells in adult bone marrow tissues has the potential to revolutionize the field of regenerative medicine. This discovery may lead to new treatments for cancer, heart disease, eye disease, diabetes and neurodegenerative disorders. Dr. Ratajczak is also known from his work on novel mechanisms of mobilization and homing of stem cells, biological role of extracellular microvesicles and molecular mechanisms of cancer metastasis.