This course discusses what is cancer, main hallmarks of cancer cells, different stages and grades of cancer, benign and malignant cells, carcinogens and carcinogenesis, proliferation and differentiation, stem cells, apoptosis and cancer, cellular senescence, phenotypic alterations in cancer cells, genotypic alterations in cancer cells, the biochemistry of cancer, metastasis, molecular diagnosis of cancer cells, principles of conventional cancer therapies, the role of molecular targets in cancer therapies, cancer in the future.