Does a lump mean “cancer”? What kind of lumps may be cancer? First of all, we have to clarify the concept of cancer or tumor: tumor is a new organism formed by excessive proliferation and abnormal differentiation of body cells under the long-term effect of internal or external factors, it is not a single disease, but a collective name of more than 200 diseases with their own etiology, natural development process and different treatment methods. It is not a single disease, but a large group of more than 200 diseases with their own etiology, natural development and different treatment methods. Benign tumors grow slowly and some of them may stop growing temporarily, and very few of them may degenerate; there is a layer of outer envelope around the tumor, so it is clearly demarcated; the tumor grows expansively, the tissue structure is similar to normal tissue, no metastasis occurs, but the surgery is not complete and it may recur, and it can occur in any part of the body. Malignant tumor grows fast and can increase significantly in a short period of time without envelope or incomplete envelope, thus the boundary is unclear. Malignant tumor cells can reach out to surrounding tissues, intermingle with adjacent normal tissues and grow infiltratively, and distant metastasis can occur. Carcinoma has become a synonym for all malignant tumors in the customary sense. In fact, carcinoma not only includes epithelial malignant tumors which account for more than 90% of malignant tumors, but also includes all malignant tumors including sarcoma. Carcinoma is derived from the Latin word “Karkinos”, “Karki-nos” meaning crab. The word “Karki-nos” means “crab”, which is chosen to describe the growth and characteristics of cancer as well as its harmful effects on human health. Common clinical tumors include: head and neck tumors, thyroid tumors, breast tumors, lung tumors, esophageal cardia tumors, mediastinal tumors, gastrointestinal tumors, liver tumors, pancreatic biliary tract tumors, urinary and male genital tumors, female genital tumors, bone tumors, malignant tumors of lymphatic and hematopoietic systems, plasma cell tumors, skin cancer and malignant melanoma, endocrine tumors, etc. The distinction between benign and malignant tumors is not absolute. A few benign tumors, such as cutaneous hemangioma, have no clear boundary with surrounding tissues and no envelope, which may become malignant after many years of untreated; benign tumors growing in the brain, such as certain pituitary tumors, although their growth pattern and cell morphology appear to be benign, they will compress the surrounding tissues and tissues after growing up, and because the skull is a solid bone tissue with limited space, the brain will be compressed, resulting in headache, vomiting, blindness, paralysis, coma and even death. The consequences are no less than those of malignant tumors. There are certainly some malignant tumors that can “automatically regress”, such as neuroblastoma, kidney cancer, choriocapillary epithelial cancer and malignant melanoma, but when the cause of cancer is not yet fully understood, the idea of sitting back and waiting for “no cure” is not enough. However, when the cause of cancer is not fully understood, the idea of “no cure” is not acceptable. Cancer is not a disease to be cured! For a long time, people think that cancer is an incurable disease and once you have cancer, you will definitely die. This concept and impression make people fear talking about cancer, and they are even influenced by the fear of cancer, so they are afraid to go to oncology hospitals to seek treatment and delay treatment. Human beings have made great efforts to overcome cancer and achieved great results. Experts have long announced that cancer is not a terminal disease and can be cured. With the continuous understanding and exploration of cancer, the emergence of new diagnostic and treatment techniques, the accumulation of clinical treatment experience and the improvement of treatment methods, the cure rate and scope of cancer cure are gradually increasing or expanding. In recent years, through early detection and improvement of treatment methods, the 5-year survival rate of many early-stage tumors such as esophageal cancer, cervical cancer, breast cancer and gastric cancer has approached or exceeded 90% in major hospitals in large and medium-sized cities in China. Even for mid- to late-stage tumors, a significant percentage of them can be cured or survive with tumors through active and appropriate comprehensive treatment. Among them, head and neck cancer, malignant lymphoma, testicular tumor and osteosarcoma are the ones with faster treatment progress. Acute childhood leukemia, which was not an incurable disease in the past, can be cured in nearly 90% of cases through comprehensive drug treatment and other adjuvant treatment measures. Therefore, with early detection, early diagnosis and early treatment, most cancer patients can survive or be cured in the long term.