Surgery Combined With IMRT-IGRT in Locally-advanced Prostate Cancers
This study targets non metastatic prostatic locally-advanced adenocarcinomas which are at
high risk of both local progression and metastases. The standard treatment of these tumours
associates external beam radiation therapy (EBRT) and 3 years of androgen deprivation (AD)
with LH-RH analogue. In the absence of AD and mainly when prostate specific antigen (PSA) is
>10 ng/ml, several randomized studies have shown that high doses of EBRT increase
biochemical control. Nevertheless, escalating the doses of radiation significantly increases
the risk of rectal and/or urinary toxicities. In order to lower the toxicity of irradiation
in locally-advanced prostate cancers, and to improve the quality of life of patients, this
study aims at decreasing the volume of irradiated healthy tissues. To carry out this
objective, we will use a double strategy:
- Limiting the target volume to prostate only by removing seminal vesicles at the time of
lymph node dissection,
- Using a technique of high-precision radiation combining Intensity Modulated Radiation
Therapy (IMRT) and Image-Guided Radiation Therapy (IGRT).
Based on the literature, we may assume a toxicity rate of 30% during the three years of
hormonotherapy with standard treatment (i.e. without removing seminal vesicles). We make the
hypothesis of a 20% absolute reduction of toxicity with our protocol.
Interventional
Endpoint Classification: Safety/Efficacy Study, Intervention Model: Single Group Assignment, Masking: Open Label, Primary Purpose: Treatment
Rate of bladder and/or rectal grade ≥2 toxicity (late toxicity)
Rate of bladder and/or rectal grade ≥2 toxicity (CTCAE V4.0) observed between 6 months and 3 years after the beginning of the radiotherapy.
between 6 months and 3 years
Yes
Renaud DE CREVOISIER, MD, PhD
Principal Investigator
Rennes CRLCC Eugène Marquis
France: Afssaps - Agence française de sécurité sanitaire des produits de santé (Saint-Denis)
ID RCB 2009-A01336-51
NCT01148069
June 2010
September 2015
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