Stereotactic Radiotherapy for Renal Caners

2016-06-23 19:08:22 | BioPortfolio


Stereotactic radiotherapy is a technique that allows the delivery of a high dose of radiation over few fractions (3-6) with great precision. It thus allows "tumor ablation" and optimal preservation of healthy tissues. Initially developed in small-sized (<5 cm) lung cancers this technique it gives results very close and or even equivalent to those of surgery.

Stereotactic radiotherapy of brain metastases of renal cancers has shown that high doses of radiation allows local control in 90 to 98% of cases. A study conducted in Sweden (Wersall et al.) underline the interest to develop stereotactic radiotherapy in primary renal tumors. In Cleveland (USA) two phase I studies are already underway.

The investigators propose to develop a phase I study for tumors of less than 4 cm. As found in lung cancers, stereotactic radiotherapy can provide a non-invasive, painless and rapid (4 to 5 fractions) method for the treatment of renal cancers with a high rate of local control.

The primary objective is to define the maximal tolerated dose for one fraction in stereotactic mode of renal tumors ≤ 4 cm in length using an a four-step dose increase:

- Step 1: 4 x 8 Gy.

- Step 2: 5 x 8 Gy.

- Step 3: 4 x 10 Gy.

- Step 4: 4 x 12 Gy.

The patients will be followed during treatment with evaluation of acute toxicities before each session, then at 15 days, 6 weeks, 3 months, 9 months, 12 months, and then every 6 months for a total duration of 5 years after treatment.

Study Design

Allocation: Non-Randomized, Endpoint Classification: Safety/Efficacy Study, Intervention Model: Single Group Assignment, Masking: Open Label, Primary Purpose: Treatment


Renal Cancer


Stereotactic radiotherapy 4 x 8 Gy, Stereotactic radiotherapy 5 x 8 Gy, Stereotactic radiotherapy 4 x 10 Gy, Stereotactic radiotherapy 4 x 12 Gy


Service de Radiothérapie - Centre Georges François Leclerc




Hospices Civils de Lyon

Results (where available)

View Results


Published on BioPortfolio: 2016-06-23T19:08:22-0400

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Medical and Biotech [MESH] Definitions

Radiotherapy given to augment some other form of treatment such as surgery or chemotherapy. Adjuvant radiotherapy is commonly used in the therapy of cancer and can be administered before or after the primary treatment.

A radiological stereotactic technique developed for cutting or destroying tissue by high doses of radiation in place of surgical incisions. It was originally developed for neurosurgery on structures in the brain and its use gradually spread to radiation surgery on extracranial structures as well. The usual rigid needles or probes of stereotactic surgery are replaced with beams of ionizing radiation directed toward a target so as to achieve local tissue destruction.

The total amount of radiation absorbed by tissues as a result of radiotherapy.

Radiotherapy where there is improved dose homogeneity within the tumor and reduced dosage to uninvolved structures. The precise shaping of dose distribution is achieved via the use of computer-controlled multileaf collimators.

Radiotherapy where cytotoxic radionuclides are linked to antibodies in order to deliver toxins directly to tumor targets. Therapy with targeted radiation rather than antibody-targeted toxins (IMMUNOTOXINS) has the advantage that adjacent tumor cells, which lack the appropriate antigenic determinants, can be destroyed by radiation cross-fire. Radioimmunotherapy is sometimes called targeted radiotherapy, but this latter term can also refer to radionuclides linked to non-immune molecules (see RADIOTHERAPY).

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