Adequate bone marrow, cardiac, kidney and liver function Patients with renal abnormalities, such as pelvic kidney, horseshoe kidney, or renal transplantation, that would require modification of radiation fields Adequate bone marrow, kidney, and liver function Prior SOT of kidney, liver, heart, lung, pancreas, small bowel, or any combination of these Adequate bone marrow, kidney and liver function Adequate bone marrow, kidney and liver function Adequate bone marrow, liver and kidney function Participants have adequate bone marrow, kidney and liver function. Adequate bone marrow, kidney and liver function Good kidney and liver function Adequate bone marrow, cardiac, kidney and liver function Severe impairment of your kidney or liver function Patients must have adequate bone marrow, kidney, and liver function, (within days prior to registration), defined as: Must have adequate coagulation, hematology, kidney, and liver function, per protocol. Patient with bilateral LG UTUC may be enrolled if at least one side meets the inclusion criteria for the trial and if the other kidney does not require further treatments (The other kidney can be treated prior to the beginning of the study). Good kidney and liver function Normal liver, kidney and bone marrow function Patients with renal abnormalities, such as pelvic kidney, horseshoe kidney, or renal transplantation, that would require modification of surgical lymph node assessments Must have adequate hepatic and kidney function. Adequate bone marrow, liver and kidney function Kidney function: creatinine < . x ULN. History of severe kidney disease (e.g chronic or acute kidney failure) with creatinine clearance below and/or severe liver disease with liver tests over times the upper normal level Patient with only kidney History of kidney stones In cases of concern about decreased renal function and potential high radiation dose to the kidneys, an optional nuclear medicine kidney function scan may be performed prior to radiation therapy to determine the functional contribution of each kidney Significant liver, lung, heart, or kidney dysfunction Cases in which the subject has a solitary or horseshoe kidney Cases in which the subject has more than two masses in the applicable kidney Chronic kidney disease > stage . Adequate bone marrow, liver, kidney function Adequate bone marrow, kidney, and hepatic function (no laboratory value > times the normal limit) Patients with renal abnormalities, such as pelvic kidney, horseshoe kidney, or renal transplantation, that would require modification of radiation fields Adequate bone marrow, kidney and liver function Patients must have adequate heart, kidney, liver and bone marrow function. Subject must have adequate kidney and liver function as described in the protocol Abnormal kidney function test results Adequate hematologic, liver, coagulation and kidney function Adequate bone marrow, kidney and liver function Adequate liver, kidney, and bone marrow function Adequate bone marrow, kidney and liver function. Performance Status of or - Adequate bone marrow, kidney and liver function Active severe kidney or liver disease Patients with renal abnormalities, such as pelvic kidney, horseshoe kidney, or renal transplantation, that would require modification of surgical lymph node assessments Adequate organ function (bone marrow, kidney and liver) Adequate kidney function Adequate liver, kidney, and bone marrow function Participants must have adequate liver, kidney, and bone morrow function Adequate glucose control, bone marrow, kidney, liver, and heart function. Creatinine =< x upper limit of normal, unless there is known chronic kidney disease (CKD) (creatinine must be at baseline for subjects with chronic kidney disease) Patients with a solitary kidney Adequate bone marrow, kidney and liver function Severe impairment of your kidney or liver function Adequate bone marrow, kidney, liver, and heart function. Adequate blood, liver, and kidney function as defined by laboratory tests. Subjects must have adequate kidney function Adequate hematologic, kidney and liver function Adequate bone morrow and kidney function Adequate bone marrow, kidney and liver function Acceptable bone marrow, liver and kidney function. Adequate bone marrow, kidney, and liver function Has adequate organ function (bone marrow, kidney and liver) Kidney: albuminuria ? mg/day in a -hour urine specimen Have adequate cardiac, bone marrow, liver and kidney function Participants must have adequate hepatic and kidney function. Patients must have acceptable neutrophil and platelet counts as well as adequate kidney and liver function. Patients with recent history of kidney stones. Kidney tumor has been removed Adequate hematologic and organ function, including blood counts, liver and kidney function Stage I Arm A (GDC-): Normal kidney and liver function (lab results must be within days prior enrollment) Significant kidney disease that would inhibit administration of gabapentin Solitary kidney No active kidney stones Chronic kidney disease or in participants without known kidney disease, estimated creatinine clearance of =< ml/min, even after rehydration Patient has a single functioning kidney Any history of cardiovascular, kidney, or liver disease acute kidney injury Adequate bone marrow, liver and kidney function History of known nephrolithiasis (kidney stones) History of severe kidney disease (e.g. chronic or acute kidney failure) with creatinine clearance below and/or severe liver disease with liver tests over times the upper normal level Single solid organ recipient (kidney only) Underlying kidney disease with a high risk of disease recurrence in the transplanted kidney Known chronic kidney disease (creatinine >= .) Adequate bone marrow reserves and liver and kidney function, as assessed by the following laboratory requirements: Have adequate bone marrow reserves and liver and kidney function, as assessed by the following laboratory requirements: History of known nephrolithiasis (kidney stones) Patients with a history of renal lithiasis within the last years or patients with evidence of kidney stones on entry evaluation Have kidney disease, defined as either CKD II-V, determined by estimated glomerular filtration rate (GFR) of < and derived from serum creatinine measurements, or albuminuria/proteinuria, determined by albumin to creatinine ratio or protein to creatinine ratio of > mg/gm within months of recruitment, or on dialysis or having received a kidney transplant or have biopsy proven kidney disease Medical condition\r\n* Renal transplant\r\n* Active or ongoing kidney disease or kidney failure, including but not limited to: functioning renal transplant, solitary kidney, proteinuria, multiple myeloma, acute and chronic nephropathies\r\n* Myasthenia gravis\r\n* Thyroid cancer or overactive thyroid\r\n* Severe congestive heart failure Patients who have chronic kidney disease Renal (kidney) disease, or solitary kidney No evidence of impaired hepatic or kidney function or have a history of kidney disease. The protocol nurse will check with the patient that there is no history of (h/o) kidney disease Good kidney and liver function Adequate bone marrow, liver, and kidney function within weeks prior to first dose Adequate function of kidney: Adequate bone marrow, kidney and liver function