Dr. Tu is a clinical professor of Genitourinary Medical Oncology at M.D. Anderson Cancer Center in Houston, Texas, USA. He is a clinician, researcher, educator, and author. He specializes in the care of patients with prostate and testicular cancers. His research interests include stem-cell origin of variant prostate cancers and mixed germ cell tumors, management of residual disease in solid tumors. He has authored more than 110 peer-reviewed manuscripts. His books, Origin of Cancers: Clinical Perspectives and Implications of a Stem-Cell Theory of Cancer and Story of Hydra: Portrait of Cancer as a Stem-Cell Disease, were published by Springer in 2010 and by Nova in 2019, respectively.