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Intraoperative radiation therapy.

Christopher G Willett¹, Brian G Czito, Douglas S Tyler

¹Department of Radiation Oncology, Duke University Medical Center, Durham, NC 27710, USA. christopher.willett@duke.edu

Journal of Clinical Oncology : Official Journal of the American Society of Clinical Oncology

|March 14, 2007

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Intraoperative radiation therapy (IORT) improves local cancer control and survival by delivering targeted radiation during surgery. Its use is expanding to new cancer types, including breast cancer.

Area of Science:

Oncology
Radiation Oncology

Background:

Intraoperative radiation therapy (IORT) is a specialized radiation technique delivered during surgery.
It is often combined with conventional treatments like external-beam radiation, chemotherapy, and surgical resection.

Purpose of the Study:

To review the role and expanding applications of IORT in cancer treatment.
To highlight IORT's potential in improving local control and survival rates for various malignancies.

Main Methods:

Review of IORT techniques, including electron beam and high-dose rate brachytherapy.
Analysis of IORT's application in primary and recurrent cancers such as rectal cancer, sarcoma, and gynecologic cancers.
Examination of emerging applications, including partial breast irradiation.

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Main Results:

IORT enhances radiation dose to the tumor bed while sparing sensitive normal tissues, improving local control.
Studies show IORT improves local control and survival in rectal cancer, sarcoma, and gynecologic cancers.
IORT is increasingly considered for early breast cancer and other non-conventional malignancies.

Conclusions:

IORT is a valuable tool for improving cancer treatment outcomes, particularly in challenging cases with high local failure rates.
The expanding applications and newer, cost-effective devices suggest a growing role for IORT in clinical practice.
Further Phase III randomized trials are recommended to validate IORT's efficacy in new disease sites.