Renal cell carcinoma (kidney cancer) at 83years. would u recommend surgery?

Depends........: Depends on overall health status, life expectancy, tumor characteristics, tumor location, tumor "aggressiveness, " and on the size of the tumor: if.

More info needed: Yes but just because 83 yr old you don't write of people in cancer treatment , could be very healthy 83 , stage of the disease, health status , patient's own desire etc are all the factors to consider, for aggressive treatment, of course end stage, disease palliation and hospice care , make as comfortable as possible is the option at any age.

Depends: How big the mass is? How good is the overall condition of the patient? Any other comorbidities ? Surgery is not the only modality. If the mass is very small-and a person is not a candidate for surgery, wither continue close monitoring or radiofrequency ablation can be an option. Discuss with your urologist in detail about the options.