Clinicians often judge the survival of cancer patients based on statistics and experience. Statistics are mathematically calculated by applying statistical methods to a large number of cancer patients with the same age, gender, disease stage, tumor site, living environment and other measurable clinical factors treated with the same treatment method (or protocol). It should be noted that the patient’s mental and psychological factors, social experience and other factors without exact measurement criteria (factors without accurate methods for comparison) may affect the treatment effect to different degrees. In other words, statistics are only applicable to macroscopic judgments of groups and can only predict group treatment effects, but not to specific patients. It is not scientific and irresponsible to patients and their families to say arbitrarily that a patient will live for several months or years.