It is impossible to tell how long any one patient will live, with stage 4 bone cancer. But, as you are probably well aware, stage 4 is the worst stage.
So, I would not put off anything that you would like to do with or for him.
The following is taken from a website on Bone Cancer:
Stage 4 Bone Cancer Survival Rates
Bone cancer was once a disease that just wasn’t easy to cure. The person suffering from the disease had to undergo an array of tests and treatments, and still the chances of survival were next to negligible. With the advancement of technology, it has become easy to fight bone cancer to a very large extent. There are three main types of bone cancer namely osteosarcoma, Ewing's sarcoma and chondrosarcoma.
These types can either be on the primary stage or the secondary stage. On the primary stage the cancer hasn’t spread and is still in the bone. It can be cured easily and its survival rate is more. Whereas the secondary stage is the phase in which the cancer spreads to the adjoining tissues and parts. This stage is fatal and the stage 4 bone cancer survival rate is also low.
Every type of bone cancer is divided into four different stages. And depending on the stage that the patient is in the survival rate is figured.
1. The first stage is the initial stage also known as the primary stage. This is the stage when the patients are diagnosed early. Thus the survival rate of this stage is about 71% to 88%.
2. The secondary stage is the one in which the tumor has increased in size but has not spread to the regional lymph nodes. These are the parts present outside the cancerous bone. The survival rate at this stage is about 57 to 70 %.
3. The third stage is the phase when the cancer spreads on exterior parts of the bones, i.e. the regional lymph nodes. The survival rate of this type of cancer is around 63%.
4. The last is the stage 4 cancer. The stage 4 caner is the most challenging form of cancer. At this stage the cancer has been spread into the surrounding organs and is the most serious. The Stage 4 bone cancer survival rate is nearly 19% to 49%.
Since the patients suffering from the stage 4 bone cancer are in a very severe condition and the tumor is spread into other organs, the stage 4 bone cancer survival rate is generally low. It is not that this stage of cancer cannot be treated at all. Because there still are treatments available to treat it like heaviest doses of chemotherapy and other drugs.
The stage 4 bone cancer survival rate depends on various factors like:
1. The treatment offered
2. The type of stage 4 bone cancer
3. The bone suffering and the organ it has spread to
4. The age of the patient
5. The overall health of the patient (physical and mental)
All the above issues will factor into the stage 4 bone cancer survival rate. The statistics come out of the stage 4 bone cancer survival rates do not help in forecasting the patient’s survival. Because of its severity, it is impractical to estimate the life expectancy of the individual suffering from the stage 4 bone cancer.
your grandpa age is 71 with stage 4 bone cancer, I think this is hard to tell anything. This is really not possible to get full relief from cancer but he can get the temporary relief from health problems which he has facing in this stage.