How long a patient with bone marrow cancer can live mainly depends on the type of bone marrow cancer, treatment and recovery, etc. It needs to be analyzed on a case-by-case basis and cannot be generalized. Bone marrow cancer is a kind of tumor with very high malignant degree, which is commonly seen in multiple myeloma and is more dangerous. If myeloma patients are found early and can actively cooperate with early treatment, such as taking appropriate radiotherapy and chemotherapy according to the situation, they can obtain better treatment effect and generally the survival period can reach more than ten years. However, if myeloma patients are not treated in time, their condition is heavy, and they are under psychological pressure, their life expectancy will be affected to a certain extent, and some of them may survive for less than one year. Therefore, myeloma patients should pay attention to maintain an optimistic attitude in their daily life, actively cooperate with doctors in treatment, and should build up confidence in treatment and adhere to it with a view to prolonging their lives.