A Phase I Evaluating Integration of HypofractionatedStudy Renal Ablative Radiation Therapy

Official Title

A Phase I Study Evaluating the Integration of Hypofractionated Renal Ablative Radiation Therapy in the Setting of Metastatic Renal Cell Carcinoma


  • evaluate the safety and toxicity profile of renal radio-ablation in the setting of metastatic renal cell carcinoma.
  • to assess renal function post radio-ablation
  • Primary and metastatic tumour response to radio-ablation

Trial Description

Primary Outcome:

  • evaluate the safety/toxicity profile of renal radio-ablation in the setting of metastatic RCC
Secondary Outcome:
  • Renal Function post renal radio-ablation
A dose limiting toxicity (DLT) will be defined as any grade 3, 4 or 5 toxicity event that is considered to be definitely, probably or possibility related to the protocol radiation therapy. Patients that cannot complete protocol therapy due to acute radiation side-effects will also be considered to be a DLT. The general (non-exhausive) list of organ based toxicity that could be related to this type of radiation therapy include toxicity to the liver, kidney, bowel, spinal cord, and pancreas. Side-effects that are exclusively due to TKI targeted therapy are not considered to be DLT in this protocol. Three patients will be recruited for the first cohort of the trial. These patients will have the PTV prescribed a dose of 25 Gray to be given in 5 daily fractions over a period of one week (first treatment to start on a Wednesday or Thursday, with planned treatment on successive business days). All therapy should be delivered within 10 business days including any treatment breaks for acute toxicity. After 3 patients have been seen at the 4 week follow up visit, CTCAE version three will be noted. If precisely 1 patient has a DLT, then an additional 3 patients will be recruited to the same cohort and given the same treatment. If no patient has DLT, then a new cohort of 3 patients will be treated to an increased dose of 30 Gray in 5 fractions. Similar criteria will dictate whether the trial ends, or continues with the next cohort being treated to a dose of 35 Gray in 5 daily fractions. There will be a maximum of 4 cohorts (25Gy, 30Gy, 35Gy, and 40Gy) in this study assuming no early DLT issues, each containing 3 or 6 patients. Allowance for a -1 cohort arm of 20 Gy in 5 fractions is made in this protocol for early DLT issues. The diagram below displays the schema in more detail. Any patient that does not complete protocol therapy due to toxicity issues or is unavailable for the 4-week toxicity assessment is considered to be non-evaluable. These patients will need to be replaced in terms of study accrual. Patients are not to be given TKI therapy during the 4 week window post-RT in order to allow for proper evaluation of the RT intervention; however, the treating oncologist ultimately can override this if it is in the best medical interest of the patient (e.g. progressive and symptomatic systemic disease)

View this trial on ClinicalTrials.gov

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