D/w your oncologist
Will depend on the location of metastases, the type of cancer cells, how much metastases, other prognostic factors- overall condition etc.
In general, from conventional studies- the median overall survival of stage 4 kidney cancer
will be around 16 to 20 months- with a 5 year overall survival of 10% or less. Il-2 for selected cases, however, can give dramatic and durable responses. D/w your md.