What Is Cancer? 1 Cancer Incidence

There are two types of so-called cancer: one is a malignant solid tumor, which includes carcinoma and sarcoma, and the other is blood cancer, such as leukemia or malignant lymphoma. The primary distinction lies in their origin: carcinomas emerge from epithelial cells, while sarcomas arise from connective tissues. In this introductory chapter, the biology of cancer cells is outlined, focusing on carcinoma. What is the difference between the growth of cancer cells and normal cells? How does our body suppress the growth of emerging cancer cells? What are the reasons for the failure to eliminate cancer cells? How do cancer cells damage our bodies? Although no complete answers to these fundamental biological questions can be provided, it is important to keep these questions in mind to understand and to effectively treat cancer.