1.Tumor cannot be prevented and cannot be treated Tumor has been proved to be a disease greatly influenced by environment, and its occurrence is closely related to diet structure, living habits, environmental pollution and so on. For example, with the improvement of living standard, Chinese people’s diet structure has changed, and the incidence of colorectal cancer has increased. Experts believe that the two most important points to prevent malignant tumors are: no smoking and reasonable diet. Tumor is not an incurable disease. If you can achieve the “three early”, the treatment effect is satisfactory. Many small hospitals do not have the conditions and equipments to carry out comprehensive tumor treatment, but they also treat tumor due to the economic interest. Some non-tumor specialists have insufficient basic theoretical knowledge and clinical experience in tumor diagnosis and treatment, but they also carry out radiotherapy and chemotherapy. Tumor is concerned with reasonable, regular and systematic comprehensive treatment, especially the first treatment often plays a decisive role in prognosis. An unregulated surgery or an unreasonably designed radiotherapy or chemotherapy program may lead to residual tumor, antagonism and drug resistance, which will bring great difficulties to the next treatment and even lead to the failure of the whole treatment. Some patients or family members often listen to some rumors and spend a lot of money to buy the so-called “ancestral secret formula” and “single formula” that can cure all tumors. Some patients or their family members often listen to some rumors and spend a lot of money to buy the so-called “ancestral secret” and “single prescription” to cure their tumors, and even pray to God for a miracle. These “cancer treatment professionals” and “ancestral families” have not only received no formal medical education, but also have no medical knowledge at all. In the end, patients are financially strapped and their conditions become more and more complicated, so that the original curable lesions develop into incurable advanced tumors. 4. In particular, the best time for surgery will be missed and it is difficult to achieve the best results. Some patients’ family members are afraid to let patients go to oncology specialist treatment because they are worried about the emotional impact on their mind after knowing their condition, and they are unwilling to carry out post-operative radiotherapy and chemotherapy after surgery, so when tumor recurrence and metastasis are treated again, it will be too late to regret. 5, a program, a Chinese medicine can cure all the tumors A certain doctor cured a patient, so many patients tend to rush to the doctor, thinking that their disease can also be cured by this doctor. In fact, tumor is complex, curing one patient is not equal to curing all patients, and the treatment of tumor is mostly comprehensive, and the radiotherapy and chemotherapy programs used for different tumors are generally different. 6.Take experimental results as clinical efficacy Nowadays, various “anti-cancer drugs” advertisements are all over the place, most of which claim to have been experimentally proven to be efficient for this tumor and that tumor, and all of them are very high. The so-called “experimental results” are more than 95% of the results of animal experiments, not the results of clinical application, which is just an advertising technique of the businessmen. Many patients and family members do not understand the metastatic and invasive characteristics of tumor, and think that surgery to remove tumor is a cure. The blind and ignorant optimism will often delay the follow-up treatment of patients. Many patients and their families hear that radiotherapy and chemotherapy have serious toxic side effects and are unwilling to accept the treatment and let the tumor develop. Although radiotherapy and chemotherapy can damage normal cells while killing cancer cells, thus causing side effects such as lowering of white blood cells, nausea and vomiting, hair loss, etc., for subclinical metastases that still exist in the body after surgery, only chemotherapy can kill them. For the various side effects of radiotherapy and chemotherapy, there are many drugs available to prevent and alleviate them. The vast majority of medical oncologists have mastered the techniques of preventing and dealing with the toxic side effects of radiotherapy and chemotherapy. There are many excellent oncology experts in China, who have deep attainments in certain fields of tumor treatment. For example, there are oncology surgery specialists specializing in tumor surgery, oncology medical specialists engaged in tumor chemotherapy, endocrine therapy, biological therapy, nutritional support therapy and oncology radiotherapy specialists engaged in tumor radiotherapy. In large cancer hospitals, the subspecialties are more detailed, such as breast tumor department, head and neck tumor department and so on. Even if they are all medical oncologists, different people may have different research focus and treatment expertise. Therefore, one should not blindly identify with a certain specialist, but choose the corresponding specialist according to the difference of disease and treatment method. 9. Cancer pain without painkillers Pain of advanced tumor is an important issue that affects patients’ survival quality. However, many patients and their families, even including a few medical personnel, wrongly believe that patients with advanced tumor do not need painkillers as a last resort. They are worried that if they use painkillers too early, the painkillers will be ineffective when the pain is aggravated later; they are worried about the adverse effects of painkillers; they are worried that once they use them, they cannot stop them; they are worried about addiction and so on. In response to these situations, the World Health Organization has formulated a specific three-step pain relief method at the end of the 20th century, and China has also gradually promoted it. Experts believe that pain relief is not beneficial, pain relief increases confidence, pain relief is also safe, pain relief is not addictive, and pain relief is not extreme. In treating cancer pain, we advocate early, adequate, regular and individualized administration of drugs. Opioids and fentanyl are better tertiary analgesic drugs for advanced cancer patients. At present, the use of dulcolax is not advocated. 10. It is impossible for tumor patients to return to society Although tumor will recur and people are therefore afraid of recurrence, it is not a lifelong disease and can be recovered. No recurrence for 5 years for malignant tumor patients is equivalent to cure. This is because if the subclinical metastases are not wiped out, after 5 years of proliferation, they should have reached a level that can be diagnosed. If no more cancer cells are found after 5 years, the patients can be considered cured and they can live and work freely as normal people.