Personally, I took my body to a doctor and began a long and tedious treatment as soon as these cells started up in it. At the same time, I quit smoking and drinking like a horse. And she began to sleep well and eat healthy. And this is the best way to deal with them. So far, I am the winner in our battle.
The most important thing, perhaps, is not to complicate life for the body, and in particular, not to load an organ affected by atypical cells. I mean one of the tags marked in the question, healthy lifestyle. You should not drink alcohol, especially in large quantities, overeat, poison yourself with something more serious, you should also quit smoking, and establish a daily routine. Follow a diet, if you are a person with a very labile nervous system, then you should consider visiting a psychotherapist, because the presence of oncology is stress for the body organically, and for consciousness also psychically, and if you are very suspicious, then constant thoughts about a terrible death, problems, and so on, obviously will not add anything good to the situation. There is a lot more to say when talking about a specific organ and a specific type of cancer / sarcoma
This is a difficult question, the answer to which depends on the type of cancer cells. After all, not all of them are treatable ... And so, of course, you need to take tests, consult an oncologist, be examined by docdoc.ru, if something worries, or there is a suspicion of cancer.
We are talking about systems with the appropriate function of collecting allergens.