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Hypofractionated SBRT For Prostate Cancer

2014-08-27 03:19:18 | BioPortfolio

Summary

The purpose of this study is to determine, in both low-risk and intermediate-risk cohorts, the rates of acute and late grade 3 or higher gastrointestinal and genitourinary toxicity observed during a 24 month follow up and to estimate the rate of biochemical Disease-Free Survival, Phoenix and American Society for Therapeutic Radiology and Oncology definitions, at 2 years following hypofractionated stereotactic body radiation therapy for low and intermediate risk prostate cancer.

Description

The CyberKnife® and Trilogy® machine should be an ideal device for treating prostate cancer because:

- targeting accuracy for static targets is excellent, with an error of about 1mm,

- it can adjust for intra-fractional organ motion, reducing the volume of the target PTV and therefore the dose to surrounding organs,

- by using over one-hundred non-conplanar beams, the dose gradient between the prostate and surrounding tissues may be superior to that achieved with conventional linear accelerators,

- the radiobiology of prostate cancer may favor large dose per fractions.

Study Design

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

Conditions

Prostate Cancer

Intervention

Stereotactic Body Radiation Therapy

Location

UPMC Shadyside Radiation Oncology
Pittsburgh
Pennsylvania
United States
15232

Status

Not yet recruiting

Source

University of Pittsburgh

Results (where available)

View Results

Links

Published on BioPortfolio: 2014-08-27T03:19:18-0400

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Medical and Biotech [MESH] Definitions

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.

Preliminary cancer therapy (chemotherapy, radiation therapy, hormone/endocrine therapy, immunotherapy, hyperthermia, etc.) that precedes a necessary second modality of treatment.

A glycoprotein that is a kallikrein-like serine proteinase and an esterase, produced by epithelial cells of both normal and malignant prostate tissue. It is an important marker for the diagnosis of prostate cancer.

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

Irradiation of one half or both halves of the body in the treatment of disseminated cancer or widespread metastases. It is used to treat diffuse metastases in one session as opposed to multiple fields over an extended period. The more frequent treatment modalities are upper hemibody irradiation (UHBI) or lower hemibody irradiation (LHBI). Less common is mid-body irradiation (MBI). In the treatment of both halves of the body sequentially, hemibody irradiation permits radiotherapy of the whole body with larger doses of radiation than could be accomplished with WHOLE-BODY IRRADIATION. It is sometimes called "systemic" hemibody irradiation with reference to its use in widespread cancer or metastases. (P. Rubin et al. Cancer, Vol 55, p2210, 1985)

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