Cancer is a collective name for many different diseases that can occur in different parts of the body. Cancer diseases have different symptoms, different prognoses, and are treated in different ways. They have one thing in common: They arise because one or more cells change and develop into cancer cells.
Here you can read more about how cancer occurs, about symptoms and about non-cancerous tumors
There are about 200 cancers. Some have early and clear symptoms. Others are not detected until the cancer disease has developed and spread in the body. Maybe you have symptoms that usually have nothing to do with cancer, but that can have it.
Some people have an inherited increased risk of getting cancer. This means that the risk is innate. It is unusual, and everyone who has an inherited risk does not get sick. An investigation can show if there is a risk of hereditary cancer. Then it is often possible to get help to reduce that risk.