Cancer is a general term for a large group of malignant tumors, and cancer may occur in almost every part of the body. Different parts of the body and different stages of cancer are able to survive for different periods of time, so it is not possible to determine how long they can last. Some of them can be cured and can not recur for life, which does not affect the life expectancy, while some of them may be more malignant and develop more rapidly, and can only survive for half a year to one year. For example, pancreatic malignant tumors, if the discovery is advanced, widely spread, there is no way to surgical treatment, this situation can not last long, most of the three months to six months, some are less than three months. There are also small cell lung cancer, many of which are prone to early brain metastasis, and this kind of treatment is also not effective, and it may only last for 1-2 years, and most of them are less than a year. Therefore, how long the cancer can last depends on the treatment, after effective anti-tumor treatment, it is possible to survive for a longer period of time, there is no way to determine the specifics, but only be able to look at the side of the treatment.