Radiosurgery in Treating Patients With Kidney Tumors

Inclusion Criteria:

* Patient is considered a poor surgical candidate for removal of renal mass as determined by anesthesiology pre-operative assessment or the surgical team, medical team. (No major psychiatric illnesses.)
* Patient is able to give and sign study specific informed consent
* No prior radiation to the treatment field
* Negative serum or urine pregnancy test within 72 hours prior to registration for women of childbearing potential
* Patient has a radiologically and /or pathologically confirmed diagnosis of a renal tumor
* Karnofsky status of ≥ 60%
* Signed study-specific informed consent prior to study entry

Exclusion Criteria:

* Any patient not meeting the eligibility criteria.
* Any patient with active connective tissue disease such as lupus, dermatomyositis.
* Any patient with active Crohn's disease or active ulcerative colitis.
* Major psychiatric illness, which would prevent completion of treatment or interfere with follow-up.