This book presents original results on the leading edge of cancer research. Topics discussed include malignancy-related ascites; targeting cathepsin b for cancer therapies; cancer stem cells; metallomics of brain tumors; hepatitis b virus and Hepatitis C virus infections and risk of pancreatic ductal adenocarcinoma; the risk and prognostic factors associated with undifferentiated nasopharyngeal carcinoma; widespread expressions of TCRs in cancer cells and the implications in cancer immunology; hormone therapy in young cancer survivors; and inhibitory effects of ribosome inactivating proteins and compounds on choriocarcinoma cells.